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Page 17
SERVICE AND MAINTENANCE (1500 UNITS)
The 1500I-ECM and 1500E-ECM are designed to be serviceable from either side. If access to the unit will only
be available from one side, the unit must be set up accordingly. The unit is factory shipped to be serviced from
the front (Blowers on the right when facing the unit). If servicing is only accessible from the other side, follow
the procedure below.
Service Unit from Other Side
1. The electrical box must be removed from the front brackets and mounted on the rear brackets
provided on the other side of the unit.
2. The filter divider panels must be removed and placed in the unit so they can be removed from the
opposite side.
3. The lower blower divider panel must be removed and mounted in the unit from the other side.
Servicing Filters
1. Remove filter service panel (one or both sides).
2. Remove first set of filters.
3. Remove filter divider panels (if only accessing from one side).
4. Remove filters from behind filter divider panel.
5. Replace all filters. Ensure that filter divider panels are re-inserted into unit.
Servicing Cores
1. Remove core service panel (one or both sides).
2. Slide cores out (regular core maintenance).
3. When placing the cores back into the unit, ensure that there are no gaps between any of the cores.
Ensure all H channels are flush with the ends of the cores before the core service panel is re-attached.
Servicing Blowers
1. Remove blower service panel (one or both sides).
2. Unscrew the 2 bolts that connect the blower to the blower rails of the unit.
3. Remove all wiring to the motors.
4. Slide blower back and lift to remove blower assembly.
5. If access to the unit is not available from both sides, remove the blower divider panel by removing the
8 bolts holding this panel in place.
6. For EFD models, unscrew the 4 bolts that connect the downward facing blower to the blower rails. Lift
out blower assembly. (End panel can be removed to facilitate blower removal).
7. Repeat steps 2 through 4 with the other blower.
• Each panel on the unit can be removed by removing the two bolts on the bottom. Servicing is easiest by
removing the side panels on both sides to gain access to either side of the unit.
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