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PGR5 Series K: Installation Instructions
Nameplate Input,
High Stage
(Btu/hr)
40000
Manifold Press. High / Low
60000
Manifold Press. High / Low (in. W.C.)
90000
Manifold Press. High / Low (in. W.C.)
115000
Manifold Press. High / Low (in. W.C.)
127000
Manifold Press. High / Low (in. W.C.)
*. In the U.S.A., the input rating for altitudes above 2000 ft (610m) must be reduced by 4% for each 1000 ft (305 m) above sea level.
In Canada, the input rating for altitudes from 2001 to 4500 ft (611 to 1372 m) above sea level must be derated by 10% by an authorized gas conversion station or dealer.
For Canadian Installations from 2000 to 4500 ft, use U.S.A. column 2001 to 3000 ft (610 to 914 m).
†. Orifices available through your distributor.
‡. Low stage manifold pressure setting for 208/230 VAC models only.
NOTE: Orifice sizes and manifold pressure settings are based on natural gas with a heating value of 1025 Btu/ft
ON/OFF SWITCH
INLET
PRESSURE TAP
Fig. 13 – Two-Stage Gas Valve (208/230 VAC Models)
ON/OFF SWITCH
INLET
PRESSURE TAP
Fig. 14 – Single-Stage Gas Valve (460 VAC Models)
If larger adjustments are required, change main burner orifices following
the recommendations of national and local codes.
NOTE: All other appliances that use the same meter must be turned off
when gas flow is measured at the meter.
Proceed as follows:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 4 – Natural Gas Orifice Sizes and Manifold Pressure
Orifice No. (Qty)
‡
(in. W.C.)
Orifice No. (Qty)
Orifice No. (Qty)
Orifice No. (Qty)
Orifice No. (Qty)
REGULATOR COVER SCREW
PLASTIC ADJUST SCREW
REGULATOR SPRING
HIGH STAGE GAS
PRESSURE REGULATOR
ADJUSTMENT
LOW STAGE
GAS PRESSURE
REGULATOR ADJUSTMENT
MANIFOLD
PRESSURE TAP
REGULATOR
COVER SCREW
PLASTIC
ADJUSTMENT
SCREW
REGULATOR SPRING
(PROPANE - WHITE)
(
NATURAL - SILVER)
GAS PRESSURE
REGULATOR
ADJUSTMENT
MANIFOLD
PRESSURE TAP
ALTITUDE OF INSTALLATION (FT. [m] ABOVE SEA LEVEL) U.S.A.
2001 to
0 to 2000
3000*
3001 to 4000
[0 to 610]
[610 to
[915 to 1219]
914]
†
44 (2)
45 (2)
48 (2)
3.2 /1.4
3.2 /1.4
3.8 /1.6
†
44 (3)
45 (3)
48 (3)
3.2 /1.4
3.2 /1.4
3.8 /1.6
†
38 (3)
41 (3)
41 (3)
3.6 /1.6
3.8 /1.6
3.4 /1.5
†
33 (3)
36 (3)
36 (3)
3.8 /1.7
3.8 /1.7
3.6 /1.6
31 (3)
31 (3)
33 (3)
3.7 /1.7
3.2 /1.4
3.5 /1.6
3
and a specific gravity of .6.
1. Turn off gas supply to unit.
2. Remove pipe plug on manifold (See
manometer. Turn on gas supply to unit.
3. Record number of seconds for gas meter test dial to make one
revolution.
4. Divide number of seconds in Step 3 into 3600 (number of seconds
in one hr).
5. Multiply result of Step 4 by the number of cubic feet (cu ft) shown
for one revolution of test dial to obtain cubic feet (cu ft) of gas flow
per hour.
6. Multiply result of Step 5 by Btu heating value of gas to obtain total
measured input in Btuh. Compare this value with heating input
shown in
Table 5
of gas is not known).
EXAMPLE: Assume that the size of test dial is 1 cu ft, one revolution
takes 32 sec and the heating value of the gas is 1050 Btu/ft
A04167
follows:
1. 32 sec to complete one revolution.
2. 3600 ¸ 32 = 112.5.
3. 112.5 x 1 =112.5 ft
4. 112.5 x 1050 = 118,125 Btuh input.
If the desired gas input is 115,000 Btuh, only a minor change in the
manifold pressure is required.
Observe manifold pressure(s) and proceed as follows to adjust gas
input(s):
1. Remove regulator cover screw(s) over plastic adjustment screw(s)
on gas valve
(Fig. 13
VAC models).
2. For 208/230 VAC models only: Turn the high stage plastic
adjustment
screw
counterclockwise to decrease input (see
models only: Turn the plastic adjustment screw clockwise to
increase gas input and counterclockwise to decrease input (see
A07751
Fig.
14). Manifold pressure must be between 3.2 and 3.8 IN. W.C.
For high stage on 208/230 VAC models and for single stage on 460
VAC models.
3. For 208/230 VAC models only: Replace high stage regulator cover
screw on gas valve (see
Replace regulator cover screw on gas valve (See
17
4001 to 5000
[1220 to 1524]
†
†
48 (2)
3.5 /1.5
†
†
48 (3)
3.5 /1.5
†
†
42 (3)
3.4 /1.5
†
†
36 (3)
3.3 /1.4
†
†
33 (3)
3.2 /1.4
Fig.
(Consult the local gas supplier if the heating value
3
of gas flow/hr.
For 208/230 VAC models,
clockwise to
increase gas
Fig.
13). For 460 VAC
Fig.
13). For 460 VAC models only:
*
5001 to 6000
[1524 to 1829]
†
48 (2)
3.2 /1.4
†
48 (3)
3.2 /1.4
†
42 (3)
3.2 /1.4
†
38 (3)
3.6 /1.5
†
34 (3)
3.2 /1.4
11) and connect
3
. Proceed as
Fig. 14
For 460
input
and
Fig.
14).
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