Altitude Derate Multiplier For U.s.a - Payne C Series Installation, Start-Up, Operating And Service And Maintenance Instructions

Table 20 – Altitude Derate Multiplier for U.S.A.
ALTITUDE
FT. M
0–2000 0-610
2001–3000 610-914
3001–4000 914-1219
4001–5000 1219-1524
5001–6000 1524-1829
6001–7000 1829-2134
7001–8000 2134-2438
8001–9000 2438-2743
9001–10,000 2743-3048
*Derate multiplier factors are based on midpoint altitude for altitude range.
SINGLE-STAGE
ON/OFF Switch
1/2" NPT Inlet
1/8" NPT Inlet
Pressure Tap
Representative drawing only, some models may vary in appearance.
Fig. 60 − Gas Valve without Tower Pressure Ports
MANIFOLD PRESSURE TAP
SET SCREW: 3/32" HEX HEAD
ACCEPTS 5/16" HOSE CONNECTION
1/2" NPT
INLET
INP
INLET PRESSURE
TAP SET SCREW:
3/32" HEX HEAD
ACCEPTS 5/16"
HOSE CONNECTION
1/8" NPT INLET
PRESSURE TAP
Representative drawing only, some models may vary in appearance.
Fig. 61 − Gas Valve with Tower Pressure Ports
PERCENT DERATE
OF MULTIPLIER
DERATE FACTOR*
0 1.00
4-6 0.95
6-8 0.93
8-10 0.91
10-12 0.89
12-14 0.87
14-16 0.85
16-18 0.83
18-20 0.81
Regulator Seal Cap
Regulator Adjustment
Regulator Seal Cap under Cap
1/2" NPT Outlet
1/8" NPT Manifold
Pressure Tap
A11153
1/2" NPT
OUTLET
OUTP
REGULATOR SEAL CAP
ON/OFF SWITCH
(REGULATOR ADJ.
UNDER CAP)
A170118
Fig. 62 − Orifice Hole
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
R Y W G
10 TURNS
FROM UNIT 24-V
CONTROL TERMINALS
5.0 AMPS ON AMMETER
EXAMPLE:
10 TURNS AROUND JAWS
Fig. 63 − Amp. Draw Check with Ammeter
68
BURNER
ORIFICE
A93059
HOOK-AROUND
AMMETER
0.5 AMPS FOR THERMOSTAT
=
ANTICIPATOR SETTING
A96316