NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 3
New York City, New York (MEA)
Installation of these fi replaces are approved
for installation in New York City in the US state
of New York.

These appliances and their individual shut-off

valves must be disconnected from the gas

supply piping system during any pressure

testing of that system at pressures greater

than 1/2 psig (3.5 kPa).

These appliances must be isolated from the

gas supply piping system (by closing their

individual manual shut-off valve) during any

pressure testing of the gas supply piping

system at test pressures equal to or less than

1/2 psig (3.5 kPa).

Orifi ce Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters) above sea level using the standard
burner orifice sizes (marked with an "*" in
Table 7). For elevations above 4500 feet,
contact your gas supplier or qualifi ed service
technician . Install the appliance according to
the regulations of the local authorities having
jurisdiction and, in the USA, the National Fuel
Gas Code NFPA 54 / ANSI Z223.1 - latest edition
or, in Canada, the CAN1-B149.1 and .2 codes
- latest edition.
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
* PROPANE GAS
Models Input Rate (BTU / HR)
SSDV-3530CPM 23,000 high
17,500 low
SSDV-4035CPM 29,000 high
22,500 low
Table 2
Electronic Models
Electronic models have a fi xed rate gas valve.
Input of electronic models is shown in Table 3.
Electronic Models with Fixed Rate Gas Valve
Natural and Propane Gas
Model Series Input Rate (BTU / HR)
SSDV-3530 23,000
SSDV-4035 29,000
Table 3
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas 5.0" WC
(1.24 kPa)
10.5" WC
(2.61 kPa)
Propane 11.0" WC
(2.74 kPa)
13.0" WC
(3.23 kPa)
Table 4
Gas Pressure - All Models

Tables 4, 5 and 6 show the appliances' gas

pressure requirements:

Manifold Gas Supply Pressure
(millivolt models)
Fuel # Low High
Natural
Gas
(Lo) 2.2" WC
(.55 kPa)
(Hi) 3.5" WC
(.87 kPa)
Propane (Lo) 6.3" WC
(1.57 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 5
Test gauge connections are provided on the
front of the millivolt gas control valve, identi-
fi ed IN for the inlet and OUT for the manifold
side. A 1/8" NPT Test gauge connection
is provided at the inlet and outlet side of
the electronic gas control valve.
Burner Orifi ce Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
Natural
Gas
drill size
(inches)
Propane
Gas
drill size (inches)
SSDV-3530 2.3 mm (.090") *
37L70 •
#54 (.055") *
99K79 •
SSDV-4035 #36 (.1065") *
18L4001 •
#52
(.0635")*
LB-55874D •
* Standard size installed at factory
• Part /Cat. Number
Table 7
Manifold Gas Supply Pressure
(electronic models)
Fuel # Max. Manifold Pressure
Natural Gas (Hi) 3.5" WC (.87 kPa)
Propane (Hi) 10.0" WC (2.49 kPa)
Table 6
* If fi eld converted - see Pages 35-37
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
NATURAL GAS
Models Input Rate (BTU / HR)
SSDV-3530CNM 23,000 high
17,500 low
SSDV-4035CNM 29,000 high
21,500 low
Table 1
H
I
LO
W
H
TPT
HT
P
T
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
IN OUT
Manifold Pressure Tap
Inlet Pressure Tap
SIT Millivolt Gas Valve
Pilot Adjustment
Screw
HI/LO Variable
Flame Height
Adjustment
Main Gas
Control Knob
OFF/PILOT/ON
Figure 1Figure 3Honeywell Electronic Gas Valve
FFO
NI
PSI
NO
L
ORTNO
C
G
INT
IER
Manifold Pressure
Port ON / OFF Switch
Inlet
Pressure
Port
Electronic Gas
Control Valve
O
N
O
F
F
P
I
L
O
T
L
O
H
I
Figure 2
GAS CONTROL
KNOB
CONVERTIBLE
HI/LO REGULATOR
(adjusts fl ame height
and heat output)
INLET
PRESSURE
TAP
PILOT
ADJUSTMENT
SCREW
WIRING
TERM-
INALS
OUTLET
PRESSURE
TAP
TP/TH
PIEZO
IGNITER
TH
TP
Honeywell Millivolt Gas Valve