Table of Contents
Advertisement
Filter Installation
Thermostat Adjustment — Single Heater Installation
Thermostat Adjustment — Multiple Heater Installations
© 2023 Nordson Corporation
Most coating materials and compounds eventually leave residual deposits on the inside
walls of the heater. These deposits may separate from the heater as small flakes or
granules, which then pass through the system and cause nozzle or fluid tip plugging. To
prevent this from happening, install a filter between the heater and the first spray gun in
the system.
Use insulated or uninsulated high-pressure fluid hose or seamless steel tubing to connect
the heater to the filter assembly. The selection of fluid line, length, and routing (hung
on a wall, laid on the floor, etc.) will have a direct effect on thermostat setting and fluid
temperature at the spray gun. It is extremely important to place the heater and filter as
close to the spray operation as possible.
Adjust the thermostat to provide a starting point temperature for heater operation.
Refer to the Operation section for adjustment procedures to obtain the desired fluid
temperature.
1. Ensure the power is removed from the heater.
NOTE:
Rotating the thermostat control clockwise increases the heater temperature.
Rotating the thermostat control counter-clockwise decreases the heater temperature.
2. [EXT ADJ] Adjust the thermostat control to mid-range.
[INT ADJ] Remove the enclosure from the heater, adjust the thermostat control to mid-
range and install the cover. Tighten the cover bolts to 1.11−1.66 kg•m (8−12 ft-lbs).
Adjust each thermostat to provide a starting point temperature for operation. Refer to the
Operation section for adjustment procedures to obtain the desired fluid temperature.
1. Ensure the power is removed from the heaters.
NOTE:
Rotating the thermostat control clockwise increases the heater temperature.
Rotating the thermostat control counterclockwise decreases the temperature.
NOTE:
The heater in the flow system that provides the final fluid output to the filter is the
last heater.
2. [EXT ADJ] Adjust the thermostat control on the last heater to mid-range. Turn the
thermostat controls on the remaining heaters fully counterclockwise.
[INT ADJ] Remove the enclosure covers from the heaters. Adjust the thermostat
control on the last heater in the system to mid-range. Turn the thermostat control on
remaining heaters fully counterclockwise. Install the enclosure covers and tighten the
cover bolts to 1.11−1.66 kg•m (8−12 ft-lb).
NH-4 Heaters
13
1602369-05
Advertisement
Table of Contents
