Thermon HELLFIRE 400, Installation, Operation & Maintenance Instructions Manual

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J.7 Motor
Running amps greater than 115% of the motor rated full load
amps can indicate failed bearings, excessive air leaks in the
ductwork, inadequately sized power supply wires, or poor
electrical connections.
Voltage Phase Motor FLA Rating* FLA X 1.15**
240 1 7.5 8.6
208 3 7.3 8.4
460 3 3.6 4.1
575 3 3.0 3.5
*FLA (Full Load Amperage), as shown on motor nameplate.
**Maximum current draw under design operating conditions of
-40°C/°F ambient temperature at sea level and supply voltage.
Current draw drops with temperature, elevation or voltage
increase.
NOTE:
Measure current between motor and contactor, not at
the supply terminals.
J.8 Vibration Specifications and Measurement
1. All motor/impeller/base sets are match balanced
with vibration levels lower than 0.20 in./sec RMS, at
the four points depicted.
2. Do not measure on covers or guards.
3. Mark locations 1, 2, 3 and 4 on motor to ensure
repeatable measurements for trend analysis.
4. Take measurements vertically at points 1 and 2, and
horizontally at 3 and 4.
Vibration Level (in./sec)
Acceptable Less than 0.20
Tolerable 0.21 to 0.29
Excessive 0.30 to 0.71
Extreme 0.72 or more
J.9 Lubrication
1. The motor has sealed bearings and does not require
lubrication.
2. When installing flame rod or igniter always apply high
temperature anti seize compound to threads.
J.10 Direct Spark Ignition Control Module (DSI)
1. This module has no serviceable parts.
2. To replace, disconnect the flame rod and ignition
wires. Remove 4 mounting screws that fasten it to
the panel. Install new DSI by reversing sequence.
3. For further information see the Fenwal 35-60J
manual in the component bulletins section at the end
of this manual.