Installation
WSHP-SVX01W-EN
57
2. Secure the equipment to a joist, concrete, etc. with the
use of 3/8 in. field provided (all-thread) rod. Each
corner should contain field provided nuts and washers
to complete the hanging installation.
3. Slope horizontal units in two directions. The unit
should contain a dual 0.25-12 pitch toward the drain
connection. This will insure proper drainage of the
unit. All plumbing to the unit should conform per
national and local codes and is the responsibility of the
contractor.
Figure 51.
Hanging the unit
SUPPLY-AIR
3/8" ALL-THREAD
(BY OTHERS)
3/8" WASHER / NUT
(BY OTHERS)
RETURN-AIR
Condensate Drain Connection
Figure 52.
Negative pressure system
CLEAN OUT
(CAPPED and SEALED)
Install proper trapping to the equipment. The unit drain
connection is 0.75 in. NPT for all GEV 0.5 to 25 ton and GEH
0.5 to 5 ton and EXH/V 0.5 to 6 ton models. For 6 to15 ton
GEH models, the drain connection is 0.5 in. PVC schedule
40 pipe.
When designing the condensate trap for the water-source
system, it is important to consider the unit draw-thru
design requiring negative pressure trapping.
In a properly trapped system, when condensate forms
during normal operation, the water level in the trap rises
until there is a constant flow. It is imperative to maintain
water in the trap and not allow the trap to dry out during
heating season. Keeping trap primed at all times will
enable the water to flow properly. See
for
appropriate dimensions required in a negative pressure
system.
Supply/Return Pipe Connections
Figure 53.
Supply/return pipe connections
RETURN
TO
LOOP
SUPPLY
FROM
CENTRAL
PUMP
AUTOMATIC BALANCING
HOSE KIT
WATER-IN
WATER-OUT
Connect the supply and return hoses to the water-inlet
(from supply) and water-outlet (to return) of the unit. For
vibration isolation, it is recommended that flexible steel
braided hoses be installed instead of hard piping the
equipment to the main loop system.
Cleaning and Flushing the Water Loop
After the piping system is complete, the flexible hose
connectors should be doubled back to complete the water
circuit external to the unit (avoiding trash settle-out in the
condenser). An extra pipe may be necessary to connect
the hose kits.
1. Water circulation system should be filled with clean
water using the water make up connections.
Note:
Air vents should be open during filling.
2. With the air vents closed, start the circulating pump
and then crack the air vents to bleed off the trapped air,
assuring circulation through all components of the
system.
Note:
Make up water must be available to the system to
replace the volume formerly occupied by the air
that is bled off.
3. With the air vented and the water circulating, the entire
system should be checked for leaks with repairs made
as required.
4. Operate the supplementary heat system (boiler)
making checks per manufacturer’s instructions. During
this operation, visual checks should be made for leaks
that may have occurred due to increased heat. Repair
as required.
5. Open the system at the lowest point for the initial blow
down (making sure the make up water is equal to the
water being dumped). Continue blow down until the
Содержание Axiom EXH Series
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