Modine Manufacturing PV Installation And Service Manual page 8

I I N N S S T T A A L L L L A A T T I I O O N N
W W i i r r i i n n g g
!
C C A A U U T T I I O O N N
Disconnect power supply before making wiring connections to
prevent electrical shock and equipment damage. ALL UNITS
MUST BE WIRED STRICTLY IN ACCORDANCE WITH
WIRING DIAGRAM FURNISHED WITH UNIT.
ANY WIRING DIFFERENT FROM WIRING DIAGRAM MAY
BE HAZARDOUS TO PERSONS AND PROPERTY.
Any damage to or failure of Modine units caused by incorrect
wiring of the units is not covered by MODINE'S STANDARD
WARRANTY (see Back Cover).
All field installed wiring must be done in accordance with the
National Electrical Code ANSI/NFPA 70 – Latest Edition or
Canadian Electrical Code CSA C22.1 Part 1 or local codes.
Unit must be electrically grounded according to these codes.
See wiring diagram shipped with unit.
The power to these unit heaters should be protected with a
circuit breaker. Units for use with three-phase electric power
must be provided with a motor starter having properly sized
overload protection.
Location of thermostat should be determined by heating
requirements and be mounted on an inside wall about 5' above
floor level where it will not be affected by heat from the unit or
other sources, or drafts from frequently opened doors. See
instructions packed with thermostat.
I I n n s s t t a a l l l l a a t t i i o o n n o o f f B B l l o o w w e e r r M M o o d d e e l l s s ( ( B B V V U U n n i i t t s s ) )
! CAUTION
Proper air flow and distribution, across the heat exchanger
must be provided to prevent early failure of the blower unit
heater.
R R e e c c o o m m m m e e n n d d e e d d I I n n s s t t a a l l l l a a t t i i o o n n s s - -
A A
TURNING
VANES
3" MIN.
A
3" MAX.
B
12" MIN.
S S I I D D E E V V I I E E W W
D D
B
A
BAFFLE
S S I I D D E E V V I I E E W W
8 8
Dimension "B" Should Never Be Less than 1/2 of "A". Duct must be fitted to discharge of unit only.
3" MAX.
B
TURNING
VANES
BAFFLE
B
TURNING
VANES
BAFFLE
A A t t t t a a c c h h m m e e n n t t o o f f F F i i e e l l d d I I n n s s t t a a l l l l e e d d D D u u c c t t w w o o r r k k , ,
B B l l o o w w e e r r ( ( B B V V ) ) M M o o d d e e l l s s O O n n l l y y
!
Do not attempt to attach ductwork of any kind to propeller
PV models.
Burned-out heat exchanger as well as shorter equipment life
will result from not providing uniform air distribution.
When installing heater always follow good duct design practices
for even distribution of the air across the heat exchanger.
Recommended layouts are shown below. When installing
blower units with ductwork the following must be done.
1. Provide uniform air distribution over the heat
Use turning vanes where required. See figures below.
2. Provide removable access panels in the ductwork on the
downstream side of the unit heater. These openings should
be large enough to view smoke or reflect light inside the
casing to indicate leaks in the heat exchanger and to check
for hot spots on exchanger due to poor air distribution or
lack of sufficient air.
3. If ductwork is connected to the rear of the unit use Modine
blower enclosure kit or if using field designed enclosure
maintain dimensions of blower enclosure as shown on
page 15.
!
Check for red heat exchanger tubes. If bottom of tubes
become red while blower unit is in operation, check for proper
air volume and air distribution. Adjust blower speed or correct
discharge duct design to correct problem.
B B
12"
MIN.
3" MIN.
12"
A
S S I I D D E E V V I I E E W W
12"
E E
MIN.
A
S S I I D D E E V V I I E E W W
CAUTION
CAUTION
C C
12"
B
MIN.
A
T T O O P P V V I I E E W W
F F
12"
MIN.
TURNING
VANES
T T O O P P V V I I E E W W
exchanger.