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HigH EfficiEncy DuctlEss split systEm
WlcA/WlHA HigH WAll EVApORAtOR
stRAigHt cOOl/HEAt pump*
Nominal Circuit Capacities:
WLHA 9,000, 12,000,
18,000, 24,000 Btuh*
and WLCA (only) 30,000 & 36,000 Btuh
* Heat Pump only available for 9,000-24,000 Btuh units.
WL CA/WLHA
Enviromaster International LLC
5780 Success Dr.
An ISO 9001-2000 Certified Company
Rome, NY 13440
www.enviromaster.com P/N# 240006021 Rev. 1.3 [05/07]
instAllAtiOn, OpERAtiOn AnD mAintEnAncE mAnuAl
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WLCA/WLHA HiGH WALL HiGH EffiCiEnCy EVAporA tor inst ALLAtion, opErA tion And mAintEnAnCE mAnUAL P/N 240006021, Rev. 1.3 [05/07] This manual is intended as an aid to a qualified service personnel for proper installation, operation, and maintenance of EMI AmericaSeries high efficiency evaporators. Carefully read these instructions before attempting installation or operation. Failure to follow these instructions may result in improper installation, operation, service, or maintenance, possib
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ControLs And ComponEnts prodUCt dEsCription Continued The AmericaSeries WLCA/WLHA is • Infra red compatible control allows available as a (Dx) direct expansion straight use of optional IR hand held controller. cool and heat pump. It offers a contempo- rary design in a ductless type evaporator and note: Unit mounted controls are combines attractive appearance with high fully functional without the handheld efficiency conditioning for small to medium remote. size commercial or residential
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WLCA/WLHA ControLs And ComponEnts Continued • Modular design – reduces parts optionAL EqUipmEnt required for control package. Deco panel, relay board, ribbon cables and • Condensate pump (field installed only) • 24V remote wall thermostat microprocessor are combined into one package. • Electric heat with automatic reset high temperature cutout and redundant • Integral condensate pump safety- high temperature fuse link (when heat switch connection where-by the mi- option is selected) crop
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WLCA/WLHA moUntinG prEp ArA tion The WLCA/WLHA must be mounted surface to absorb any potential vibration plumb and level to a vertical surface to and prevent the formation of condensation prevent unit vibration and/or unwanted on the wall. noise. It is recommended that the unit notE: If excessive noise or vibration is be mounted directly to a smooth surface ® experienced from a unit mounted to a ma- such as Sheetrock wallboard or similar sonry block wall, check to ensure the unit is ma
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions Electrical Wiring site preparation All wiring should be in accordance with the for the proper wire and breaker or time National Electric Code (NEC) and the local delay fuse size. building codes. 4. Inspect the existing wiring for any defects 1. Make sure power is off. such as cut or frayed wires. Replace if any such wiring if found. 2. Check the unit rating plate for circuit am- pacity and breaker or time delay fuse size. NOTE:
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions 4. To access High and Low wiring remove the screw on the front of the control box. High Volt Electrical Wiring 5. Refer to the wiring diagram to connect the power wire to Black L1 and the other wire to Red or White (115V) L2 at the power connector location. 6. Connect the ground wire to the ground lug or lead at the same location in the control box. Low Volt interconnect Wiring for Unit mounted ontrols c the 24V control transfo
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions LoW VoL t intErConnECt WirinG for Unit moUntEd ControLs Units With or Without Heat ontinued c Unit mount Controls Heat pump Connection Straight Cool Unit mount Controls Two-Stage Heating Figure 1A Figure 1B Not used Not used Low Volt interconnect diagram intercon- When connecting to a defrosting heat nect diagram Figure 1A and Figure 1B pump, such as EMI model S1HA, indoor for unit mounted controls. units with electric heat utili
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions Heat pump Connection remote t hermostat – t wo-stage Heating Low Volt interconnect diagram interconnect diagram f igures 2A, 2B & 2C for remote wall thermostat control. Depending on the thermostat re- quired or selected, air handlers may Figure 2 B utilize four to six low Volt intercon- necting wires between the indoor unit, thermostat and outdoor unit. Some thermostats do not require the use of the “C” (brown) connec- tion. In t
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions rEfriGErAnt pipinG pipinG do’s And don’ts The WLCA/WLHA is equipped with a Flo-Rater/Piston Expansion device. Con- • Avoid piping on a rainy day. nections are sweat type. • Use refrigerant grade copper tubing. • Use a tubing bender and avoid unnec- The suction line (large) must be insulated essary bending. the entire length with closed cell, foam tube • Cap ends of lines until ready for final insulation. Do not insulate the liquid l
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rEfriGErAnt pipinG Any change in the diameter of the tubing must be made at the indoor connection. WLH24 Line-set diameter is determined by the condenser service valve size. Use of a larger diameter liquid or suc- tion line can harm the compressor! educing bushing goes here for r 18,000 Btuh system match piston/orifiCE inst ALLAtion instrUCtion Important: Replace the existing piston (before installing the unit) with the piston supplied in Kit Bag when any: • WLHA24 evaporator is matched
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions rEfriGErAnt proCEssinG 4. Braze tubing into fittings. WArninG ! ! It is illegal to discharge 5. Attach manifold set. refrigerant into the atmosphere. Use proper reclaiming methods Manifold Vacuum Pump Micron Gage and equipment when installing or servicing this unit. Top discharge condeser shown Finish all pipe connecting before proceeding to charging the system. Follow the instructions in the outdoor unit for line evac
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions rEfriGErAnt proCEssinG Top discharge 8. Charge to proper weight, charge condeser shown based on your feet of interconnect (see below). Note: Charging should be done with a dial-a-charge or weighed in with a scale. refer to refrigerant Charge t able for specified line charge. IMPORTANT NOTES: I. To find the charge adjustment and system charge for any evaporator and tubing length: Line Adjustment = (Line Chg/Ft) x Line Length Sys
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WLCA/WLHA HiGH WALL EVAporA tor inst ALLAtion instrUCtions rEAssEmBLinG tHE WLCA/WLHA CABinEt When satisfied that the system is leak free reinstall the bottom and left end cap in the precise order shown below: Ensure seam is tight. 1. Replace the bottom panal. 5. Once end cap is properly seated tighten the screw as shown above. 2. Fasten the right end 6. Thighten bottom cap side first with the end cap screw. Philips-head screw. 3. Next replace and tighten the re- maining screws across
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ControL UsEr intErf ACE instrUCtions qUiCK GUidE – UsEr intErf ACE BUttons “modE” button = select mode of operation, Cool, Heat, Auto changeover (ACO), Dry or Fan mode. “Up” arrow button = increase set “timEr” button = enter or exit point temp., also = increment set- Sleep Timer mode. tings in Config., Time Set + Prog. modes. “timE” button = enter or exit Set Time mode. “on/off” button press once = unit on or off. “proG” button = enter or exit Pre-prog. Run mode. “doWn” arrow button = de
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ControL UsEr intErf ACE instrUCtions UsEr intErf ACE BUttons f An The “f An” button will select ver mode. To enter the louver mode press the fan speed, High, Low or Auto. High and hold the Fan/Louver button for three and low are constant fan speed settings seconds. While in louver set mode the and can be selected in all modes except word “Lou” will display on the LCD. Dry mode. In Dry mode, the fan will op- erate constantly at low speed. Auto fan ALtErnA tE BUtton sELECtions mode is not a
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sEqUEnCE of opErA tion – Unit moUntEd KEy p Ad modE the desired fan setting in all modes except Unit mount infrared Dry mode. In Dry mode, the fan will oper- Control operation ate constantly at low speed. The LCD will EMI Air Handlers are equipped with a unit indicate fan speed selection. mount, infrared compatible control pack- High and Low are constant fan settings. age. This user friendly, microprocessor The fan will operate continuous regardless control is designed to optimize syste
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sEqUEnCE of opErA tion – Unit moUntEd KEy p Ad modE or Down arrow buttons will allow selection room temperature and setpoint tempera- ture will be displayed. Press either the of six different fixed louver positions or Up or Down arrow buttons to change the auto (oscillation) mode. The sequence is setpoint temperature. The setpoint tem- 01, 02, 03, 04, 05, 06 and Auto. Once the desired setting is selected, press the Fan/ perature will change by one degree with Louver button momentarily or
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sEqUEnCE of opErA tion – Unit moUntEd KEy p Ad modE between room temperature and setpoint perature by two degrees, heating will stop temperature is less than two degrees. At and cooling will continue to bring the room that time the electric heat will switch off temperature back down to setpoint temper- ature. The fan will operate continuously at and the heat pump (compressor) will take over the heating demand. The electric low speed while in Dry Mode. heater will not re-start until a three
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sEqUEnCE of opErA tion – Unit moUntEd KEy p Ad modE any mode including the Off mode. To en- manual run ter the Set Time mode, press the “TIME” button in for three seconds. Pressing This is normal operating (non pre-pro- the “PROG” (NEXT) button will advance gram run) mode. Settings for temperature, to the next item. The order is (1) Day of mode and fan speed are selected by the week, (2) Hour and (3) Minute. Pressing user and will not change with the passing the “MODE” (BACK) button wi
