60
If a larger cut-out is needed for additional
duct connections not provided by the
factory, or for any other reason, it is very
important that the foam be completely
sealed.
Insulation
covers
should
be
fabricated from sheet metal to cover the
foam at the cut. The edges and corners that
are not covered should be sealed using
silicone caulking. If a reciprocating saw is
used to make the cut out, take care that the
metal skins of the foamed part do not
separate from the foam, this would result in
reduced structural integrity of the part.
Size supply conductors based on the unit
Minimum Current Ampacity (MCA) rating.
Supply conductors must be rated a minimum
of 75°C.
Protect the branch circuit in accordance with
code requirements. The unit must be
electrically grounded in accordance with
local codes, or in the absence of local codes,
the
current
National
Electric
Code,
ANSI/NFPA 70 or the current Canadian
Electrical Code CSA C22.1.
Wire power leads to the unit’s terminal
block or main disconnect. All wiring beyond
this point has completed at the factory.
Supply voltage must be within the min/max
range shown on the unit nameplate.
Available short circuit current should not
exceed the SCCR rating shown on the unit
nameplate.
Three phase voltage imbalance will cause
motor overheating and premature failure.
The maximum allowable imbalance is 5%.
Voltage imbalance is defined as 100 times
the sum of the deviation of the three
voltages from the average divided by the
average voltage.
Example:
(218V+237V+235V)/3
=
230V,
then
100*(230V-218V)/230V = 5.2%, which
exceeds the allowable imbalance.
Check voltage imbalance at the unit
disconnect switch and at the compressor
terminal. Contact your local power company
for line voltage corrections.
Installing contractor must check for proper
motor rotation and check blower motor
amperage listed on the motor nameplate is
not exceeded. Motor overload protection
may be a function of the variable frequency
drive (VFD) and must not be bypassed.
Note:
All units are factory wired for
208/230V, 460V, or 575V. If unit is to be
connected to a 208V supply, the transformer
must be rewired to 208V service. For 208V
service interchange the yellow and red
conductor on the low voltage control
transformer.
Red-Black for 208V
Yellow-Black for 230V
Installing Contractor is responsible
for proper sealing of the electrical
and gas entries into the unit. Failure
to seal the entries may result in
damage to the unit and property.
Three phase voltage imbalance will
cause
motor
overheating
and
premature failure.
CAUTION
CAUTION
Summary of Contents for M2 Series
Page 2: ......
Page 5: ...5 Split System Piping Diagrams 98 M2 Series Startup Form 115 Maintenance Log 121 ...
Page 35: ...35 Table 1 Electric and Gas Heating Capacities ...
Page 38: ...38 Figure 5 M2 Series Unit Four Point Lifting ...
Page 39: ...39 Figure 6 M2 Series Unit Eight Point Lifting ...
Page 58: ...58 Figure 32 Supply Fan Banding ...
Page 95: ...95 Figure 52 Filter Layout Viewed from the Upstream Side of the Cooling Coil ...
Page 98: ...98 Split System Piping Diagrams Figure 53 A C Split System Piping Suction Down ...
Page 99: ...99 Figure 54 A C Split System Piping Suction Up ...
Page 100: ...100 Figure 55 A C with LAC Split System Piping Suction Up ...
Page 101: ...101 Figure 56 A C with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 102: ...102 Figure 57 A C with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 103: ...103 Figure 58 A C with Hot Gas Bypass Split System Piping Suction Down ...
Page 104: ...104 Figure 59 A C with Hot Gas Bypass Split System Piping Suction Up ...
Page 107: ...107 Figure 62 Heat Pump Split System Piping Suction Down ...
Page 108: ...108 Figure 63 Heat Pump Split System Piping Suction Up ...
Page 109: ...109 Figure 64 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 110: ...110 Figure 65 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 111: ...111 Figure 66 Heat Pump with Hot Gas Bypass Split System Piping Suction Down ...
Page 112: ...112 Figure 67 Heat Pump with Hot Gas Bypass Split System Piping Suction Up ...