AERCO KC1000 Heater 2002 - Manual (Page 13)

INSTALLATION
2-5
NOTE:
An individual gas pressure regulator must
be installed upstream of each unit. The
regulator must regulate gas pressure to 8.5”
W.C. for FM gas train and 8.9” W.C. for IRI
gas trains at 1,000,000 BTU/H for natural
gas and propane units.
The maximum static inlet pressure to the unit
must not exceed 14” W.C. Minimum gas
pressure is 8.5” W.C. for FM gas trains and 8.9”
W.C. IRI gas trains when the unit is firing at
maximum input. Gas pressure should not
exceed 10.5” W.C. at any time when the unit is
firing. Proper sizing of the gas supply regulator in
delivering the correct gas flow and outlet
pressure is mandatory. The gas supply pressure
regulator must maintain the gas pressure at a
minimum of 8.5” W.C. (FM) or 8.9” W.C. (IRI)
when the unit is at maximum BTU input
(1,000,000 BTU/HR). The supply gas regulator
must be able to supply sufficient capacity
volume, (1000 cfh), to the unit and should have
no more than 1" droop from minimum to full fire.
The supply gas regulator must also be rated to
handle the maximum incoming gas pressure.
When the gas supply pressure will not exceed
14” W.C. a non-lock up, or flow through style
regulator, may be used. When supply gas
pressure will exceed 14” W.C., a lock up style
regulator must be used. The gas supply
regulator must be propery vented to outdoors.
Consult the local gas utility for exact
requirements concerning venting of supply gas
regulators.
CAUTION!
A lockup style regulator must be used when
gas supply pressure exceeds 14” W.C.
2.4.2 MANUAL GAS SHUTOFF VALVE
A 1-1/4” manual gas shutoff valve is furnished
with each unit and should be positioned as
shown in Figure 2.6. The valve must be installed
upstream of the gas supply regulator in a readily
accessible location.
2.4.3 IRI GAS TRAIN KIT
The IRI gas train is an optional gas train required
in some areas by code or for insurance pur-
poses. The IRI gas train comes pre-assembled
and wired from the factory. See Appendix E,
Drawing SD-A-606.
The IRI gas train may be ordered pre-assembled
or as separate components. If either IRI gas
train option is ordered a complete instructional
package, detailing field installation will be
included. To obtain a copy of an IRI instructional
package prior to the equipment shipping contact
your local representative or AERCO.
2.5 ELECTRICAL SUPPLY
The AERCO Gas Fired Equipment Electrical
Power Wiring Guide, (GF-1060), must be
consulted in addition to the following material
before wiring to the unit is started. AC power
connection to the unit are made at the Power
Box.This box is located on the front right side of
the unit as shown in Figure 2.7.
POWER BOX
BLOWER
SSOV
ACTUATOR
FRAME
Figure 2.7
AC Power Box Location
NOTE:
All electrical conduit and hardware should
be installed so that it does not interfere with
the removal of any cover, inhibit service or
maintenance, or prevent access between
the unit and walls or another unit.