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NOTE: Access to the manifold pressure test port is on the top of the valve. A 3/16" Allen
Wrench is necessary to check this. When checking or setting the manifold pressure, a water
manometer should be used. Gauges which measure in ounces per square inch or pounds
per square inch are not accurate enough to properly measure or set the pressure.
WARNING
THIS HEATER WILL EXPAND IN LENGTH AS IT HEATS UP. It is a normal condition that
during heat-up and cool-down a tube heater will expand and contract. Allowances for heater
expansion must be made in the gas connection, venting and combustion air ducting. Improper
installation, alteration, or adjustment can result in property damage, injury or death. See also
Section 13
The Btuh input and the tube length determine the overall expansion that occurs. A typical in-
frared tube installation will expand toward both the Burner and the vent end.
To allow heater expansion the gas supply must be installed using the flexible gas connector
supplied in the burner kit:
In the USA: a stainless steel Flexible Gas Connector certified for use on an
infrared radiant tube heater (ANSI Z21.24 CSA 6.10);
in CANADA: a Type 1 Hose Connector (CAN/CGA 8.1). Also the flue vent,
and combustion air intake (if used) must be installed in such a manner that
the normal expansion of the heater will be accommodated.
IMPORTANT: See next page: orientation of flexible gas connector between heater and
gas supply.
TABLE 5
SPW2-JZ /
Tube
STW2-JZ
Length
IWP2 / IW2
Feet
Model
80 / 60,000
20 / 30
110 / 75,000
30 / 40
130 / 90,000
30 / 40
155 / 110,000
40 / 50
175 / 125,000
50 / 60
200 / 140,000
50
200 / 140,000
60
Approx.
USA: Mandatory
Expansion
Flexible Gas Connector
in Length
ID x Length - Part #
1 3/4"
1/2" x 24" - JL-0771-XX
2"
1/2" x 24" - JL-0771-XX
2"
1/2" x 24" - JL-0771-XX
2 1/2"
3/4" x 36" - JL-0771-YY
2 3/4"
3/4" x 36" - JL-0771-YY
2 3/4"
3/4" x 36" - JL-0771-YY
3 1/4"
3/4" x 36" - JL-0771-YY
37
CANADA: Mandatory
Type '1' Gas Hose
Size - Part #
1/2" x 36" - JL-0771-RC
1/2" x 36" - JL-0771-RC
1/2" x 36" - JL-0771-RC
3/4" x 36" - JL-0771-RB
3/4" x 36" - JL-0771-RB
3/4" x 36" - JL-0771-RB
3/4" x 36" - JL-0771-RB
SPW2, STW2(S) / IWP2, IW2(S) I&O Manual
RD: APR 2019
IM170629
RL: 03C
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