LAARS Mighty Max HH (Sizes 320M - 400M) - Installation, Operation and Maintenance Instructions - Manual (Page 16)

Page 16
LAARS Heating Systems
2.14Electrical Wiring
WARNING
Electrically ground the heater in accordance with
the latest edition of ANSI/NFPA 70. In Canada, use
CSA C22.1. Do not rely on the gas or water piping
to ground the metal parts of the heater. Often,
plastic pipe or dielectric unions isolate the boiler
electrically. Service and maintenance personnel
who work on or around the boiler may be standing
on wet floors and could be electrocuted by an
ungrounded boiler. Electrocution can causse
serious injury or death.
AVERTISSEMENT
La chaudière doit être mise à la terre selon les
exigences officielles locales ou, en l’absence de
toute instruction officielle, l’installation doit être
conforme avec la dernière édition du Code
électrique canadien CSA C22.1, Partie 1, au
Canada. N’utilisez pas la tuyauterie de gaz ou
d’eau pour mettre à la terre les parties métalliques
de la chaudière. Les unions diélectriques ou avec
tuyau en plastique peuvent isoler la chaudière
électriquement. Les membres du personnel de
service et d’entretien qui travaillent sur et autour de
la chaudiére peuvent marcher sur des planchers
mouillés et pourraient se faire électrocuter par une
chaudière non mise à la terre.
1. Check boiler wiring and pump for correct
voltage, frequency, and phase.
2. Wire the boiler and pump exactly as shown in
the wiring diagram supplied with the boiler (see
Figure 12).
3. Electrically interlock the pump and boiler so the
boiler cannot come on unless the pump is
running.
4. Connect all field-installed devices (relays,
timers, temperature devices, etc.) to the boiler
wiring at points labeled “Field Interlock” (see
Figure 12).
2.13.3 Conversion for Ducted
Combustion Air
The conversion to ducted combustion air
requires the parts listed in Table 8. Follow these
procedures to convert the heater (see Figure 11):
1.
Remove the louvered plate from the left side of
the boiler.
2. Remove the adapter plate from the shipping
container.
3. Install the blower motor housing collar in gasket.
4. Slip one end of the inlet pipe over the collar on
the adapter plate.
5. Slide the inlet pipe and adapter plate into the
boiler opening until the pipe is aligned with the
blower motor.
6. Slip the end of the inlet pipe over the blower
motor housing collar.
7. Secure the adapter plate to the side of the boiler
with the 4 screws.
2.13.4 Combustion Air Piping
Run piping of the appropriate size between the
air intake terminal and the boiler (see Table 7). Table
9 lists the materials for piping the boiler.
Term Description
Pipe Single-wall galvanized steel pipe,
24 gauge minimum.
Joint Sealing Permanent duct tape or aluminum
tape
Insulation Not required, but recommend R5
insulation for cold installations
(consult American Society of
Heating, Refrigerating, and
Air Condditioning Engineers
(ASHRAE) handbook
Table 9. Required Combustion Air Piping Material.
OUT OF
PRODUCTION