Power
Thermostat Wiring
Supply Air
| Building |
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Flexible | Loop |
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Connection |
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| Water |
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| Out |
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| Water |
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| In | Balancing Valve |
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| (field installed |
and calibrated | ||
stainless steel | accessory) | |
braid | hose |
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with integral | Low Pressure | |
“ J” swivel | Drop Water | |
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| Control Valve |
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| (optional) |
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| accessory) |
| Ball Valve with optional | |
Compressor | integral P/T plug | |
Access Panel | (typical for supply and | |
| return piping) |
process is the same for right and left return configurations. See Fig. 5 and 6.
NOTE: It is not possible to convert return air between left or right return models in the field due to refrigerant piping changes.
Preparation — The unit should be on the ground in a well lit area for conversion. Hung units should be taken down to ground level before converting.
Water | Remove Screws |
Connection End |
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Return Air
NOTE: Ball valve with integral pressure temperature plug recommended.
Fig. 4 — Typical Vertical Installation —
50PCV Units
Step 3 — Locate Unit — The following guidelines should be considered when choosing a location for a WSHP:
• Units are for indoor use only. |
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• Locate in areas where ambient temperatures are between | ||||
| 40 F and 100 F and relative humidity is no greater than | |||
| 75%. |
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• | Provide sufficient space for water, electrical and duct | |||
| connections. |
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• | Locate unit in an area that allows easy access and | |||
| removal of filter and access panels. |
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• | Allow enough space for service personnel to perform | |||
| maintenance. |
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• Return air must be able to freely enter the space if unit | ||||
| needs to be installed in a confined area such as a closet. | |||
• Install the unit on a piece of rubber, neoprene or other | ||||
| mounting pad material for sound isolation. The pad | |||
| should be at least 3/ in. [10 mm] to | 1/ | 2 | in. [13 mm] in |
| 8 |
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| thickness. Extend the pad beyond all four edges of the | |||
| unit. |
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• | Provide adequate clearance for filter replacement and | |||
| drain pan cleaning. Do not block filter access with pip- | |||
| ing, conduit or other materials. Refer to Fig. 1 and 3 for | |||
| dimensional data. |
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• Provide access for fan and fan motor maintenance and | ||||
| for servicing the compressor and coils without removing | |||
| the unit. |
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• Provide an unobstructed path to the unit within the closet | ||||
| or mechanical room. Space should be sufficient to allow | |||
| removal of the unit, if necessary. |
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• In limited side access installations, | ||||
| control box side mounting screws will allow control box | |||
| removal for future servicing. |
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• Provide access to water valves and fittings and screw- | ||||
| driver access to the unit side panels, discharge collar and | |||
| all electrical connections. |
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| NOTE: Correct placement of the horizontal unit can play an | |||
| important part in minimizing sound problems. Since duct- | |||
| work is normally applied to these units, the unit can be |
Side Discharge
Water
Connection End
Rotate
Return Air
| Move to Side |
Water | Replace Screws |
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Connection End |
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Return Air
Drain
Back Discharge | Discharge Air |
Fig. 5 — Conversion Left Return, Side Discharge to Back Discharge
Water
Connection End
Return Air
Supply
Duct
Side Discharge | Water |
| Connection End |
Return Air
placed so that the principal sound emission is outside the oc- |
cupied space in |
may be required by the local code if a fire wall is penetrated. |
FIELD CONVERSION OF DISCHARGE AIR — The dis- charge air of the 50PCH horizontal units can be converted
Drain
Discharge Air
Back Discharge
between side and back discharge in the field. The conversion
Fig. 6 — Conversion Right Return, Side Discharge to Back Discharge
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