Thermon HELLFIRE 400, Инструкция по установке, эксплуатации и обслуживанию

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G.4 Site Preparation
1. Identify the tie to be replaced by the tie duct, or the
crib for the crib ducts. Relative to the appropriate
tie or crib, prepare a foundation for the heater with
ties, concrete pad, or other suitable level mounting
structure.
2. Note the location for the gas, electrical supply, and
the signal cable lines.
3. Refer to the local gas and electrical authority in order
to determine gas pipe and electrical line sizes.
4. At the heater, the gas inlet is a female ¾” NPT pipe
thread, the power terminal block accepts #14 - #2
AWG wire sizes, and the control and indicate wires
connect to AAR 1/4” post terminals.
G.5 Heater Installation
1. A typical complete system is composed of 4 parts,
the heater, a transition duct, a tie duct or crib duct
set, and a track duct set, each packaged separately.
2. Install the duct system components first, as per
Switch Heater Duct Installation Manual, part number
16359.
3. Remove shipping cover attached to combustion
chamber flange. Remove thermostat box from
shipping cover and discard cover.
4. Remove banding strap securing access panels. Open
combustion chamber access panel and remove loose
packaged contents including large gasket kit, and if
included with order, the precipitation detector, rail
thermostat and flexible gas line.
5. Lift heater, (375 lbs), using lift pockets and place on
the foundation.
6. Level heater, adjusts leveling legs, and align with the
transition duct flange.
7. Fasten the heater and transition flanges together
with the supplied gasket kit.
8. Fasten heater legs to foundation using lag screws
supplied or suitable fasteners.
G.6 Gas Supply Piping and Minimum Pressure Drop
WARNING
WARNING. Personnel approved by the local gas
authority must perform gas line connection.
1. Nominal supply pressure, 14 inches water column,
with no more than 20% pressure drop, with all
connected loads operating.
2. The minimum recommended supply pipe size is
¾”. Determine required pipe size based on supply
pressure, length of run, and the total demand of all
connected loads.
CAUTION
CAUTION. Undersized gas piping will affect the
light off reliability of any connected appliance.
3. Install dirt trap and strainer to supply inlet.
4. Install a flexible gas line between the gas line riser
shutoff valve and the dirt trap / strainer inlet.
5. Prior to firing the heater, purge the gas lines of any air
and dirt through the opened dirt trap cap.
6. Reinstall the dirt trap cap and check all joints for
leaks.
FLEXIBLE GAS LINE
STRAINER
DIRT TRAP CAP
3/4” NPT
DIRT TRAP
STRAINER CAP
STRAINER PLUG
G.7 Electrical Power Connections
WARNING
WARNING.
Risk of electrical shock or electrocution.
Disconnect power at service.
Heaters must be wired in accordance with local
electrical codes.
The electrical grounding of the appliance shall be in
compliance with CSA C22.1, Canadian electrical code,
Part 1, or National Electrical Code, ANSI/NFPA 70.
Personnel approved by the local electrical authority
must perform electrical power connection.
IMPORTANT NOTE
Surge Protection Recommendations
This switch heater utilizes a number of processor-based
control systems, all of which are susceptible to damage from
lightning and other electrical surges. While every effort has
been made to ensure that the control systems have been
adequately ‘hardened’, Thermon Heating Systems’ surge
mitigation efforts can only be effective if ALL external remote
circuits connecting to the switch heater have been protected
by primary surge protection devices in accordance with
the following generally accepted requirements for surge
protection of wayside signal equipment:
ࢦ
Provide primary surge protection devices (standard signal
air gap arresters) on all external switch heater control I/O
circuits. These arresters should be located “upstream” of
the switch heater housing (within the signal housing,
which interfaces to the switch heater). It is essential to
protect ALL circuits entering or leaving the signal housing.
ࢦ
Provide a primary surge protection device (commercial
high capacity MOV type) on the external switch
heater ac power feed. This surge protection device
should be located “upstream” of the switch heater in
conjunction with the electrical service entrance panel
and main disconnect. Observe primary surge protector
manufacturer’s instructions for installation and circuit
breaker protection (if required).
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