Schwank STW-JZ1 - Manual (Page 33)

33
STW-JZ / IW I&O Manual
IM101229
RL: 12A- BA
RD: DEC 2010
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.
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 con-
tract. Allowances for heater expansion must be made in the gas connection, vent-
ing 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 infrared tube installation will expand toward both the Burner and the
vent end.
To allow heater expansion the gas supply must be installed using:
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.
TABLE 5
WARNING
Input
Rating
Btuh
Tube
Length
Feet
Approx.
Expansion
in Length
USA: Mandatory
Flexible Gas Connector
ID x Length - Part #
CANADA: Mandatory
Type ‘1’ Gas Hose
Size - Part #
45,000 10 1” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
45,000 20 1 1/4” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
60,000 20 / 30 1 1/2” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
80,000 20 / 30 / 40 1 3/4” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
110,000 30 / 40 / 50 2” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
130,000 30 / 40 / 50 2” 1/2” x 24” - JL-0771-XX 1/2” x 36” - JL-0771-RC
155,000 40 / 50 / 60 2 1/2” 3/4” x 36” - JL-0771-YY 3/4” x 36” - JL-0771-RB
175,000 50 / 60 / 70 2 3/4” 3/4” x 36” - JL-0771-YY 3/4” x 36” - JL-0771-RB
200,000 50 2 3/4” 3/4” x 36” - JL-0771-YY 3/4” x 36” - JL-0771-RB
200,000 60 / 70 3 1/4” 3/4” x 36” - JL-0771-YY 3/4” x 36” - JL-0771-RB
IMPORTANT: See next page: orientation of connection between heater and gas supply.