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11
Service and Maintenance
Follow manufacturer application procedure
for proper heating system/boiler cleaning
and preventive treatment.
Above referenced products are available
from Alent plc, Consumer Products Division,
4100 6
Avenue, Altoona, PA 16602, Tel:
th
(972) 547-6002 and/or selected HVAC
distributors. Contact Thermal Solutions for
specific details.
iii. Sentinel
X400 System Restorer (For
®
Older Closed Loop Hydronic Heating
Systems)
iv. Sentinel
X300 System Cleaner (For
®
New Heating Systems)
v.
Sentinel
X100 Inhibitor (For Protecting
®
Closed Loop Hydronic Heating Systems
Against Lime scale And Corrosion)
Follow manufacturer application procedure
for proper heating system/boiler cleaning
and preventive treatment.
Above referenced products are available
from Douglas Products and Packaging,
1550 E. Old 210 Highway, Liberty, MO
64068, Tel:(877) 567-2560 (Toll Free) and/or
selected HVAC distributors.
Contact Thermal Solutions for specific
details.
b. Equivalent system freeze protection products
may be used in lieu of product referenced
above. In general, freeze protection for new or
existing systems must use specially formulated
glycol, which contains inhibitors, preventing
the glycol from attacking the metallic system
components. Ensure that system fluid contains
proper glycol concentration and inhibitor
level. The system should be tested at least
once a year and as recommended by the
manufacturer of the glycol solution. Allowance
should be made for expansion of the glycol
solution.
Figure 11-2: Condensate Overflow Switch Orientation
106308-05 - 3/23
APEX
(continued)
Poison Hazard.
Use only inhibited propylene glycol solutions
specifically formulated for hydronic systems.
Do not use ethylene glycol, which is toxic and
can attack gaskets and seals used in hydronic
systems. Use of ethylene glycol could result in
property damage, personal injury or death.
E. Condensate Overflow Switch and
Condensate Trap Removal and
Replacement:
For removal or replacement of the condensate
overflow switch and/or condensate trap follow the
steps below. For parts identification, refer to Section
13 "Service Parts".
1. Condensate Overflow Switch Removal and
Installation, Operating, & Service Instructions
!
WARNING
Replacement:
a. Disconnect power supply to boiler.
b. Remove 2 wire nuts and disconnect overflow
switch wire pigtails from boiler wiring.
c. Using pliers, release spring clip securing the
overflow switch to condensate trap body and
remove the switch. Note that the switch has
factory applied silicon adhesive seal, which
may have to be carefully cut all around to
facilitate the switch removal.
d. Ensure the trap overflow switch port is not
obstructed with silicon seal debris, clean as
needed.
e. Apply silicon sealant to the replacement switch
threads and install the switch into the trap
body making sure it is properly oriented - the
arrow molded into the switch hex end side
must face down for proper switch operation.
See Figure 11-2 "Condensate Overflow Switch
Orientation" for details.
f. Reconnect the switch wire pigtails to the boiler
wiring and secure with wire nuts.
g. Restore power supply to boiler. Fill up the trap
(see Section 5 "Condensate Disposal") and
verify the switch operation.
119
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