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V5442N "Corona" 4-way Compact Rotary Mixing Valves — TROUBLESHOOTING • SERVICING
TROUBLESHOOTING
Table 2. Troubleshooting
Symptom
Space temperature too low.
Boiler return temperature
too low.
Space gets colder as higher
valve settings selected
SERVICING
The V5442 is designed to give years of trouble-free operation,
provided it is used in an oxygen-depleted hydronic heating
system. The V5442 may be used in a combo heating system
only with heat exchangers between the potable and hydronic
heating systems.
Since the V5442 is a gate-type valve, we recommend that
the hydronic system be flushed before putting the valve into
operation to minimize potential damage to the seals by
debris in the system. We also recommend adding Y-strainers
and a 10% side-stream filter to the system after flushing to
capture debris that may be added in future through the boiler
feed water valve.
In automatic control systems where the V5442 has been
motorized with an M6063 actuator, the V5442 should be
operated every 3 days or so during the off season to ensure
the valve does not seize up.
If the valve stem starts to leak, replace the O-ring as shown
in Fig.9.
Home and Building Control
Honeywell Inc.
1885 Douglas Drive North
Minneapolis, MN
55422-4386
95C-10888
RJ 10/99
Possible Causes
1. Thermostat set too low.
2. Mixed supply water not hot enough.
1. Boiler Aqustat control set too low.
2. Mixed return water not hot enough.
3. Aquatrol minimum temperature too low.
Loop supply and boiler return pipes
are reversed.
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, ON
M2H 3N7
Printed in U.S.A.
Action
1. Turn up thermostat.
2. Set V5442 to higher number
1. Turn up Aquastat.
2. Set V5442 to lower number
3. Increase Aquatrol minimum temperature
setting
Switch control handle to opposite scale.
Fig. 9 O-Ring replacement
07116 1035
www.honeywell.com
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