Modine MDB Série Manuel D'installation Et De Maintenance page 16

oPtional controls / controls locations
deadfront non-Fused disconnect switch (sW-01)
(Mounted in the electrical control cabinet when furnished)
WarninG
If equipped with the Deadfront Disconnect Switch option, when
the switch is in the "OFF" position, supply power remains
energized at the supply power terminal strip and the top of the
dead front disconnect switch. When providing service on or
near these terminals, building supply power to the unit should
be de-energized.
The dead front disconnect switch is factory installed in the
electrical control cabinet when furnished. The disconnect switch
is designed so that it must be turned "OFF" before entry to the
electrical control cabinet can be obtained. When in the "OFF"
position, power is disconnected to all unit wiring electrically
following the switch but remains energized before the switch
(See Warning).
Figure 16.2 - electrical control cabinet j
20
21
SIDE PANEL
1. Power Distribution Block or Optional Non-Fused
Disconnect Switch (SW-01)
2. Ground Lug
3. Control Transformer Primary Fuse Holder (FU-09)
4. Control Voltage Transformer (TR-01)
5. Control Transformer Secondary Fuse Holder (FU-26)
6. Low Voltage Control Transformer (TR-14) [24V Control
Units Only]
7. Low Voltage Circuit Fuse Holder (FU-27) [24V Control
Units Only]
8. Motor Starter (ST-01) or VFD (VF-01)
9. Terminal Blocks
10. Wireway
11. Flame Safeguard Controller (RE-02)
j Typical right hand access component mounting shown for most model sizes and types. Depending on unit configuration, not all
components shown may be included and location may vary slightly.
16
Figure 16.1
deadfront non-Fused disconnect
1 3
4
2 5
8
2
12. Pilot Flame Rod Lockout Relay (RE-46) [1925MBH and
13. Electronic Modulating Class II Isolation Transformer (TR-
14. Maxitrol Electronic Modulation Gas Controller (RE-26)
15. Modulating Valve Transformer (TR-04)
16. Low Speed Firing Rate Potentiometer (MP-02) [VFD
17. Discharge Temp Limit Stat (TC-13) [VFD Equipped Units
18. Control Relays (as needed) [See Wiring Diagram]
19. Optional Timed Freeze Protection (TC-24)
20. Optional Dirty Filter Pressure Switch (PS-21)
21. Optional GFCI Convenience Outlet (RC-67)
7-500.10
12 11
6 19
2
7 16
18
13 15
MAIN PANEL
Larger]
07)
Equipped Units Only]
Only]
17
14
10
9