INSTALLATION INSTRUCTIONS
LUX PRODUCTS CORPORATION
PSMH45
VERSATILE HEAT PUMP
THERMOSTAT
43243 Rev B
\|
50 « 60 = 70 « 80 + 90
LEE
ALK HEAT = L
ESP — новм HEAT OFF COOL
FAN | Lauro
SPECIFICATIONS
THERMAL DATA
Temperature Range:
50°F to 90°F (10°C to 32°C)
Differential: Stage 1 Heat — 14 °F
Stage 2 Heat — | “F
Cooling — 1} °F
ELECTRICAL DATA
Switch Rating: 24 volts AC (30 VAC max.)
Stage 1 Heat — 0.2 to 1.2 Amps
Stage 2 Heat — 0.1 to 1.2 Amps
Cooling — 0.2 to 1.0 Amps
Switch Action: Sealed Mercury Switches
Anticipator Rating:
Stage 1 Heat & Cool — SPDT
Stage 2 Heat — SPST
Stage 1 Heat — 24 volts AC fixed
Stage 2 Heat — 0.1 to 1.2 Amps adjustable
Cooling — 24 Volts AC fixed
SELECTING THERMOSTAT LOCATION
The proper location of the room thermostat is most important to insure that it
will provide a comfortable home temperature. Observe the following general
rules when selecting a location:
1.
2.
3.
4.
Locate it about 5 ft. above the floor with a free flow of air.
Install it on a partitioning wall, not on an outside wall.
Never expose it to direct light or radiation from lamps, sun, fireplaces,
etc.
Avoid locations close to doors that lead outside, windows or adjoining
outside walls.
Avoid locations close to radiators, warm air registers, or in the direct
path of heat from them or lack of air circulation such as behind doors
or in alcoves.
Make sure there are no pipes or duct work in that part of the wall
chosen for the thermostat location.
Never locate it in a living room that is warmer or cooler than the rest
of the home, such as a kitchen or hallway or on the opposite side of
the wall of a cold or unused room.
The living or dining room is normally a good location, provided there
is no cooking range or refrigerator on the opposite side of the wall.
SAFETY
This thermostat is a precision instrument, and should be handled carefully.
Rough handling or distorting components could cause the thermostat to
malfunction.
CAUTION: To prevent electrical shock and/or equipment damage, disconnect
electric power to the system at main fuse or circuit breaker box until
installation is complete.
WARNING: Do not use on circuits exceeding 30 volts. Higher voltage will
damage the thermostat and could cause a shock or fire hazard. Do not exceed
the specification ratings.
MEAL EATION
If replacing an existing thermostat, be sure to label the wires before
they are removed. This will help with the installation of the new
control.
. Remove the cover of the new thermostat by carefully pulling outwards
from each corner until it snaps free.
. Carefully remove and discard any packing which protects the
thermometer and the mercury switches during shipment.
If a new location is chosen or if this is a new installation, first run new
thermostat cable to the location chosen. All wiring must meet with all
applicable local and national electrical codes.
Check heat pump wiring diagrams for the required number of wires.
Use color coded thermostat wire for ease of installation.
ATTACHING THERMOSTAT WIRE
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sen
Pull about 4 inches of thermostat wire through the wall opening and
lead through the round opening above the terminal block.
Strip wires » inch.
Loosen screws on terminal block but do not remove.
Place leads into the appropriate holes on the terminal block as
designated on the circuit board and tighten the screws securely.
(Refer to the wiring diagrams if needed for the appropriate wire
location.)
Push the excess wire into the wall and plug up the hole to prove
drafts from affecting the thermostat operation.
Mt. Laurel, New Jersey, 08054 USA
ATTACHING THERMOSTAT TO WALL
1. Attach the thermostat directly to the wall with the screws and wall
anchors provided using the two elongated holes at the top of the
thermostat.
2. Level the thermostat. Use a level placed on top of the thermostat for
best results. Minor adjustments can be made using the elongated
holes. Securely tighten the mounting screws.
IMPORTANT This thermostat was calibrated at true level. Any inaccuracy in
level will cause a control point deviation. Care must be taken to mount the
thermostat in a true level position.
MOUNTING HOLES \
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THERMOSTAT CABLE
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TERMINAL BLOCK
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HEATING ANTICIPATION
1. This thermostat is equipped with fixed anticipators for stage one heat
and cooling which do not require adjustment. Stage two heat
anticipator must be set to the current draw of the second stage
heating component it is controlling times 1.5.
2. To determine the correct heat anticipator setting, use a digital AC
ammeter by breaking the W2 line and install in line. Or, you may use
a split jaw induction type meter and wrap exactly 10 turns of
thermostat wire around the center of the jaws.
A. With the system power off, connect the ends of the 10 turn loop
to terminals R and W2.
B. Turn the system power on and read the current on the meter.
Divide the reading by 10 to obtain the current draw of the second
stage heating component.
C. Turn off the system power, remove the coil leads from the
thermostat, and move the system switch to OFF.
D. Move the anticipator lever to the determined setting.
3. Replace the cover.
Additional adjustments, if necessary, may be made as follows:
Heat cycles are too long — Set the adjustable heat anticipator to a slightly
lower dial setting (1/2 division).
Heat cycles are too short — Set the adjustable heat anticipator to a slightly
higher dial setting (1/2 division).
SYSTEM OPERATION AND CHECKOUT
Use the chart below to check out all functions of your thermostat. It explains
the operation of your thermostat with the switches in various positions. After
satisfactory check-out, your thermostat is ready for operation. Set system
switches to desired operations. Set thermostat temperature lever to the room
desired room temperature. It takes at least one hour after the room has
reached the thermostat setting for all sensors to stabilize.
NOTE: In heat pump applications, time delays are involved before the
compressor can be activated to prevent short-cycling. The delays are provided
by a minimum-off-time timer in the heat pump unit which prevents the
compressor from starting for up to 5 minutes from when the thermostat last
turned the compressor off, or from the time the system first received power.
MAINTENANCE
These thermostats have been carefully adjusted at the factory by trained
technical calibrators and should not require recalibration. The thermostats
should be properly located and leveled. The thermostat should be allowed to
stabilize at room temperature for one hour before checking thermostat
calibration. The material thickness between the thermostat base and that of
the cover warrants a stabilization period to confirm calibration between the
two. A standard thermometer may be used to correlate temperature of the
room to that of the thermostat. A few degrees difference between the indicator
setting of the thermostat and the actual room temperature is not considered
too important.
WIRING DIAGRAM
TERMINAL MARKINGS
Terminal
Typical Connection Designation
Heating 1st Stage Y
2nd Stage W2
Cooling 1st Stage Y
Fan G
Transformer, switched side, single source R
Transformer, unswitched side, common connection X
Damper (heat); Reversing Solenoid (heat changeover valve) B
Damper (cool); Reversing Solenoid (cool changeover valve) 0
Emergency Heat Relay E
NOTE: The Y terminal activates the first stage HEAT and first
stage COOL.
NOTE: The changeover relay valve can be activated in either the COOLING or
the HEATING mode. By connecting the relay to the “0” terminal, the relay will
be activated by moving the system switch to COOL. By connecting the relay to
the “B” terminal, the relay will be activated by moving the system switch to
HEAT. Check your owners manual for the appropriate connection for your
system.
IMPORTANT: The thermostat must have the “X” terminal (Transformer
Common) connected in order for the first stage heat anticipator to work
properly.
р
FIXED =
COOL $
ANTIC.S
TECHNICAL SERVICE
If you have any problems installing or using this thermostat, please reread the
instructions carefully. Technical Service is available through our Technical Service
number. If you require assistance, please call our offices between 8:00 a.m. and 4:3
p.m. Eastern Standard Time. Monday through Friday. The number is (856) 234-8803.
WARRANTY
Limited warranty: If this unit fails because of defects in materials or
workmanship within one year of date of original purchase, Lux will, at its
option, repair or replace it. This warranty does not cover damage by accident,
misuse, or failure to follow installation instructions. Implied warranties are
limited in duration to on year from date of original purchase. Some states do
not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you. Please return malfunctioning or defective
units to the participating retailer from which the purchase was made, along
with proof of purchase, Please refer to Technical Service section before
returning thermostat.
Purchaser assumes all risks and liability for incidental and consequential
damage resulting from installation and use of this unit. Some states do not
allow for the exclusion of incidental or consequential damages, so the above
exclusion may not apply to you. This warranty gives you specific legal rights
and you may also have other rights, which vary, from state to state. Applicable
in the USA only.
RECYCLING NOTICE
This thermostat contains mercury in sealed glass vials. Do NOT dispose of
this thermostat in the trash. Neither this thermostat nor any existing mercury
thermostat this replaces should be disposed of in the trash. Contact your local
waste management authority for proper disposal instructions for mercury in a
sealed glass tube.
OPERATION AND SYSTEM CHECKOUT
2-Stage Heat Pump Mechanical Thermostat
SWITCH POSITIONS
EMER HEAT FAN
SYSTEM
SYSTEM FUNCTION
COMPONENT OPERATION
CooL OFF HEAT NORM EMER AUTO ÓN FAN RELAY | REV VALVE
CONTACT
COMPA NIX HEN EMER MEAT | aux LIGHT | EMER LIGHT
No heat, no cooling, no fan, no lights
Cooling Mode — Compressor contractor
and fan relay cycle from thermostat.
Heat Mode — Stage 1 Only - Compressor
contractor and tan relay cycle from
thermostal.
Heat Mode — Both Stages - compress
contractor, tan ¡ml ау Рей re heat os
and aux. light on.
Emer, Heat Mode - o Fan and
emergency heat relay energ
Compressor locked out at thermostal.
Emes, Bight on.
Emer. Heat hn Both re Fan,
eme Land auxiliary a
hn retin locked out
thermostat. Emer. and aux. hs on
Fan runs continuous regardless of
m Switch position,
MI Shows position of Switches and corresponding Functions during operation.
[1 This System Function will operatz if a jumper from E to W2 is connected. (Field Option)
0 Reversing valve energized if connected to “O” Terminal
B Reversing valve energized if connected to “BE” Terminal
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