Modine Manufacturing MPR Series, Инструкция по установке и обслуживанию

Страница: 55 / 68

55 MCP15-500.9
MAINTENANCE - CONTINUED
Cooling Coil Drain Pan and Drain System
The drain pan, trap, and drain pipe must be cleaned regularly to
avoid blockage that can reduce or stop water flow as follows:
1. At the beginning of the cooling season, inspect and clean
the entire cooling coil cabinet and condensate drain pan to
remove contaminants.
2. Inspect and clean the condensate drain trap and piping.
The use of a cleanout opening at the top of the trap (see
Figure 8.2) can help facilitate this maintenance.
3. Fill the trap with water to ensure proper operation and
replace the cap on the cleanout opening to close the
system.
4. During the end of cooling season shutdown of the system,
disconnect and remove all water from the trap and drain to
prevent freeze damage. If local building codes permit, the
trap may be filled with an antifreeze solution.
5. If the unit is used year round, regularly inspect and clean
the cooling coil cabinet, condensate drain pan, and trap/
drain system to ensure proper function.
6. Depending on climate, freeze protection of the trap may be
required during non-cooling days.
Refrigeration System Coil Maintenance
1. Periodically, inspect the coils (evaporator, condenser, and
hot gas reheat if applicable) for signs of corrosion and
leaks. Repair and replacement of the coil and the
connecting piping, valves, etc., must be performed as
needed by a qualified technician.
2. Should the coil surface need cleaning, caution should be
exercised in selecting the cleaning solution as well as the
cleaning equipment. Improper selection can result in
damage to the coil and/or health hazards. Cleaning
solutions must not be corrosive or cause damage to copper
tube/aluminum fin, or all aluminum coils. Clean the coil
from the leaving air-side so that foreign material will be
washed out of the coil rather than pushed further in. Be
sure to carefully read and follow the cleaning fluid
manufacturer’s recommendations before using any
cleaning fluid.
Note: The condenser coil is constructed of aluminum
materials and contains refrigerant under high pressure. Do
not use acidic solutions to clean the coil, as it could lead to
corrosion.
Inlet Hood
If the unit is equipped with an outside air inlet hood, check to
ensure the inlet screen behind the hood is clean and free of
debris.
Washable
Filter
Filter
Support
Channels
VIEW FROM INSIDE OF CABINET DOOR
Cabinet
Ventilation Hood
Air Filters
If the unit is supplied with a dirty filter switch, replace the air
filters any time the Modine Control System controller provides a
dirty filter alarm notice.
Units without a dirty filter pressure switch should have the
air filters checked monthly. Replace if necessary. In dirty
atmospheres, air filter maintenance may be required more
often. Pleat direction must be vertical to ensure optimum
performance.
Control Cabinet Door Filter
A reusable rigid polyester filter is located inside the control
cabinet door. B and C-Cabinet units have a single filter as
shown in Figure 55.1 while D-Cabinet units have two filters.
Inspect the filter(s) with the same frequency as the air filters
(see previous section). If necessary, the filter may be removed
and washed with water. Allow to dry and reinstall within the filter
support channels in the door.
Figure 55.1 - Control Cabinet Door Filter (B-Cabinet shown)