Installation, Start-Up, Adjustment and Maintenance Manual
29
The connections for water and gas piping are located at the service plate on the right-side panel of the
chiller (see Figure 12).
Figure 12
–
SERVICE PLATE DIMENSIONS
4.4 GAS SUPPLY PIPING
All gas piping must conform to the latest edition of
National Fuel Gas Code ANSI Z223.1
and all local
gas piping codes. In Canada, the gas piping must conform to the
CGA Standard CAN1 B149.1
and
.2
,
"Installation Code for Gas Burning Appliances & Equipment"
and local codes. Your gas utility must
be contacted regarding local requirements, type and size of gas lines. Safe lighting and other
performance criteria were met with the gas manifold and control assembly provided on the chiller,
when it underwent the tests specified in the standards shown on the rating plate.
For Natural Gas the minimum inlet gas pressure to the chiller is 5" W.C. and the maxim
um is 14” W.C.
For Propane Gas the minimum inlet gas pressure to the chiller is 11" W.C. and the maximum is 14"
W.C.
For size of gas connection to the unit, see Figure 12.
Gas supply pressure higher than stated above could damage the gas valve, resulting in a fire hazard.
Vertical gas piping must be trapped and a means provided to drain condensate that may accumulate
in the piping during the cold season (see Figure 13). Insulation may also be necessary for the gas
piping to prevent excessive accumulations of condensate.
An approved union should be installed in the gas line near the unit and down stream of any external
shut-off valve that may be required by local codes.
Use an approved sealing compound resistant to propane gas on all male pipe threads.
The chiller and its gas connections must be leaked tested before placing the chiller in
operation.
WARNING
3
-3
/1
6”
2”
6
-7
/8
”
1
-1
3/
16
”
4-
1/4”
2-7/8”
2-
1/2” 1-13/16”
6-
1/4”
OIL CONNECTION
– 1/4”FPT
GAS CONNECTION
– ½” FPT
WATER CONNECTIONS
– 1” FPT
ELECTRICAL KNOCKOUTS
– 7/8”
