User guide

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SECTION 2 FTCS-IOM-2013-1114 INSTALLATION
2-7
combustion or nuisance failures.
TABLE 5 MINIMUM MAKEUP AIR REQUIREMENTS AND
RECOMMENDED AREA OF OPENING FOR VENTS
Model Minimum
Make-Up
Air (SCFM)*
Opening Area
(in2)**Lower
Vent
Opening
Area (in2)
Upper Vent
FT-0080C 200 400 135
FT-0120C 300 600 205
FT-0160C 400 800 270
FT-0240C 600 1200 400
FT-0320C 800 1600 535
FT-0400C 1000 2000 670
FT-0600C 1500 3000 1000
FT-0800C 2000 4000 1335
FT-1000C 2500 5000 1670
FT-1200C 3000 6000 2000
FT-1400C 3500 7000 2335
FT-0400S 1000 2000 670
FT-0600S 1500 3000 1000
FT-0800S 2500 4000 1335
*Minimum make-up air requirements are based on 25% excess air at high  re.
**Opening areas are calculated based input of a single heater and do not account
for the ventilation needs of the equipment room. These measurements are
subject to state and local regulations.
NOTE:  A properly designed make-up air system in the
equipment room will preclude these possibilities and is
required to maintain proper combustion.
7. Eliminate potential for high risk situations for particulate
matter to be in the combustion air supply (e.g., as a
result of construction and maintenance activities).
Utilities
 The Gas Supply
Adhere to the following for gas supply installation:
1. Install gas piping in accordance with all applicable
codes.
2. Ensure pipe and  ttings used are new and free of dirt or
other deposits.
3. Ensure piping is of the proper size for adequate gas
supply to the gas head assembly. Consult your gas
company for speci c recommendations.
4. When making gas piping joints, use a sealing
compound resistant to the action of lique ed
petroleum gases. Do not use Te on tape on gas line
heads.
5. Ensure no piping stresses are transmitted to the
equipment. The equipment shall not be used as a pipe
anchor.
6. Ensure all vent connections on diaphragms, gas valves,
pressure regulators, and pressure switches (gas- red
units) are vented per local code.
7. On gas- red units with NFPA valve trains, ensure the
vent valve is piped to atmosphere per local code. See
Figure 4.
FIGURE 2  DIMENSIONS REFER TO TABLE 2