Reznor MAPSII Series Parts Manuals - Manual (Page 26)

P-MAPS II, PN 271467R1, Page 25
CODE 174 - Gas Valves
(For functional replacement valve by Serial No. Code, see Form P-VALVES.)
Single Stage Gas
Valves in both AG55
and AG57 Controls
Modulating
Gas Valve
in AG57 6:1
Gas Controls
1st
Single-Stage
Gas Valve
2nd Single-Stage
Gas Valve
165 - Optional Low
Gas Pressure Switch
166 - Optional High
Gas Pressure
Switch (manual
reset)
166 - Optional High Gas Pressure
Switch (manual reset)
To 2/3 burner
To 1/3
burner
157 - Orifice Adapter
156 - Orifice Adapter
2nd
Single-Stage
Gas Valve
Electronic Modulating/Regulating
Valve for Optional 6:1 /turndown
(See table above for P/N by Size)
1st
Single-Stage
Gas Valve
165 - Optional Low
Gas Pressure
Switch
166 - Optional
High Gas
Pressure Switch
(manual reset)
to 1/3 burner to 2/3 burner
Gas Train
Layout - Sizes
100, 150, 200,
250, 300, 350,
400 with AG55
3:1 Gas Controls
and Optional
Pressure
Switches
Gas Train Layout - Sizes 100, 150,
200, 250, 300, 350, 400 with AG57 6:1
Gas Controls and Optional Pressure
Switches
Inlet Gas Pipe
Size 100-300, 1/2”; Size 350-400, 3/4”
Inlet Gas Pipe
Size 100-300, 1/2”
Size 350-400, 3/4”
Sequence of Operation:
The 1/3 burner valve and the 2/3 burner
valve are energized. After 20 seconds the
1/3 burner valve is de-energized (this is
Stage 1).
For Stage 2, the full (non-split) burner
valve and the 1/3 burner valve are
energized, while the 2/3 burner valve is
de-energized.
Stage 3 brings the 2/3 burner valve back
on so all valves are energized.
To 2/3
Burner
Section To 1/3
Burner
Section
Two Orifices To
Full Burner Section
Single-Stage Valve
controlling flow to
Full (non-split) Burner
Single-Stage
Valve
controlling
flow to
2/3 Burner
Single-Stage
Valve
controlling
flow to
1/3 Burner
Inlet Gas Pipe
Size 450-700, 1”
STAGE 1
STAGE 2
STAGE 3
Gas Train Layout - Sizes 450, 500, 550, 600,
650, 700 with AG55, 3:1 Gas Controls
CODE 175 -
Maxitrol Signal
Conditioner
used with
AG57 6:1 Gas
Control, P/N
134170
P/N Description
260603 1/2” Single-Stage Valve, VR8215T1239, Natural Gas
See
applications
in illustrations
below.
196981 3/4” Single-Stage Valve, VR8305K4241, Natural Gas
263999 1/2” Single-Stage Valve, VR8215T5214, Propane
196983 3/4” Single-Stage Valve, VR8305K4258, Propane
205582 Maxitrol Modulating Valve, MR410, Heat Section Sizes 100 & 150
205581 Maxitrol Modulating Valve, MR410-1, Heat Section Size 200
205580 Maxitrol Modulating Valve, MR510, Heat Section Sizes 250 & 300
208370 Maxitrol Modulating Valve, 3/4”, MR610-1-66, Heat Sctn Sizes 350 & 400
208371 Maxitrol Modulating Valve, 1”, MR610-1-88, Heat Section Sizes 450, 500,
550, 600, 650, & 700
Replacement
Valves
P/N 260603
P/N 263999
P/N 196981
P/N 196983