Instructions / Assembly

MAINTENANCE / REPLACEMENT PARTS
10 1-500
MAINTENANCE
WARNING
When servicing or repairing of this equipment, use only
factory-approved service replacement parts. A complete
replacement parts list may be obtained by contacting
Modine Manufacturing Company. Refer to the rating plate
on the unit for complete model and serial number and
Company address. Any substitution of parts or controls
not approved by the factory will be at the owner’s risk.
CAUTION
Do not reuse any mechanical or electrical controllers
which have been wet. Replace defective controller.
IMPORTANT
To check most of the Possible Remedies in the
troubleshooting guide listed in Table 7.1, refer to the
applicable sections of the manual.
All installation and service of these units must be performed
by a qualified installation and service agency.
Before any service, BE SURE TO TURN OFF ALL
ELECTRICAL POWER TO THE HEATER. Turn off supply
and return shut off valves as required.
At a minimum, before the start of each heating season:
1. With the Disconnect Switch in the “OFF” position,
inspect all electrical circuits for loose connections and
signs of physical damage.
2. Wipe clean or vacuum the electrical junction box section
of all dirt that may affect the unit operation.
3. Check for correct fan operation, no excessive noise or
vibrations.
4. Wash down the cabinet using mild detergent and treat
any paint damage or rust as necessary.
5. Clean coil of dirt, lint, and dust, which can reduce the
unit heating capacity. Use a high pressure air hose to
loosen dirt by blowing from side where air leaves coil.
Coils subjected to corrosive fumes should be checked
and cleaned frequently. Do not use any commercial
solvent that could deteriorate the coil and do not use
any liquid or steam sprays that could damage electrical
components.
6. Provide controlled water treatment; don’t use excessive
amounts of boiler compounds. Contact your boiler
compound supplier for proper usage.
7. Periodic internal flushing of the coils is recommended in
areas where water supply is suspected of causing scale.
Use an alkaline-chelant solution and introduce it at the
main pump of the hydronic system. Flush thoroughly.
8. De-aerate boiler feed-water (particularly if large amount
of new water is used).
9. Clean strainers ahead of unit.
10. Adequately vent each unit to remove air from system.
REPLACEMENT PARTS
For ease of identification when ordering replacement parts or
contacting the factory about your unit, please quote the Unit
Type and unit Serial Number. This information can be found
on the serial plate attached to your unit (see Figure 6.1 and
Figure 10.2).
When a component part fails, a replacement part should be
obtained through our Parts Department. If the part is
considered to be under warranty, the following details are
required to process this requirement:
1. Full description of part required, including unit part
number, if known.
2. The original equipment serial number.
3. An appropriate purchase order number.
Figure 10.1 – Model Nomenclature
HHD 30 S 01
Model Type
HHD = Hot Dawg H
2
O
MBH Rating
@ 180°F EWT, 60°F EAT, 2 GPM
Coil Type
S - Standard
Power Code
01 = 115V/60Hz/1ph
Figure 10.2 – Serial Number Format
-
SPO Number
(if applicable)
Sequential Numbe
r
(0000 to 9999)
Year of Manufacture
(10=2010)
Week of Manufacturer
(12=12th Week)
Fan Supplie
r
(contact Modine)
Motor Manufacture
r
(contact Modine)
S = Special Product Orde
r
(if applicable)
10 6789 12345S 010112