White Rodgers 1050 User Manual

WHITE-RODGERS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.

The Type 1050 Indoor-Outdoor Control is designed for use on
conventional hot water heating systems where it is desired to
vary boiler temperature according to outdoor weather condi­tions. These controls are not recommended for radiant panel
installations because of the lower boiler temperatures required.
Type 1050 has open-on-rise (SPST) switch action.

This indoor-outdoor control increases or decreases frequency
of burner operation to maintain a proper balance between boiler
temperature and outdoor temperature. This control should
always be used with a separate high limit control.

For increased flexibility, this control has two simple adjustments
that enable it to be set to meet the needs of almost any
installation. The square dial is used to adjust the reset ratio from
1-1/2 to 1, up to 1 to 1-1/2. The round dial permits additional
adjustment, if necessary, to raise or lower boiler water tempera­ture at all outdoor temperatures.

TYPE 1050

INDOOR - OUTDOOR

HOT WATER TEMPERATURE CONTROL

With Adjustable Reset Ratio

INSTALLATION INSTRUCTIONS

DESCRIPTION

THIS CONTROL MUST BE INSTALLED BY A QUALIFIED
INSTALLER.

Do not exceed the specification ratings.
All wiring must conform to local and national electrical

codes and ordinances.
This control is a precision instrument, and should be

handled carefully. Rough handling or distorting compo­nents could cause the control to malfunction.

This control has been accurately calibrated at the factory.
Any attempt to calibrate this control will void the White­Rodgers warranty.

ELECTRICAL DATA
Switch Action: Open on Rise
Switch Rating: S.P.S.T.

14F.L.A., 84L.R.A., 120V.A.C.
7F.L.A., 42L.R.A., 240V.A.C.

5.6A.,@ 25V, 120V.A.C.

2.8A.,@ 240V.A.C.

PRECAUTIONS

CAUTION

To prevent electrical shock and/or equipment
damage, disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete.

WARNING

Do not use on circuits exceeding specified volt­ages. Higher voltages will damage control and
could cause shock or fire hazard.

SPECIFICATIONS

THERMAL DATA
Range:Outdoor Temp.- -20° to 70°F (-24° to 21°C)

Boiler Temp.- 60° to 120°F (16° to 49°C) min. setting

-100° to 250°F (38° to 121°C) max. setting

Differential: - 10°F Fixed (5.5°C)
Capillary Length: Outside - 30 Ft. (9 m)

Inside - 15 Ft. (4.5 m)

Bulb Size: Outside - 3/8" x 3-5/8"

Inside - 7/16" x 3" for 1/2" NPT well

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
[phone], FAX [phone]

9999 HWY. 48, MARKHAM, ONT. L3P 3J3
[phone], FAX [phone]

Printed in U.S.A.

PART NO. 37-1640B

Replaces 37-1640, 37-9163, 37-9264

9620

INSTALLATION

MOUNTING
BRACKET

OUTDOOR BULB

CEILING

ROOF

Both the outdoor bulb and inside bulb should be installed
before the control case, since capillary lengths of these bulbs will
normally determine the final location for the control case.

A. INSTALLING THE OUTDOOR BULB:

Locate the outdoor bulb so that it senses actual outdoor air
temperature. Attach mounting bracket supplied with control to
some convenient outside part of the building so that the outdoor
bulb is:

1. Exposed to circulation of air and wind.

2. Shielded from rain, snow, and direct rays of sun.

3. Not close to false sources of heat such as dryer vents,
exhaust fans, melting snow or ice, etc.

4. Sufficiently above ground to prevent tampering or being
covered with snow, ice, or debris.

B. INSTALLING THE WATER BULB:

The water bulb should be installed in a hot section of the boiler.
It should never be installed near a return inlet to the boiler.

C. INSTALLING THE CONTROL CASE:

The case of the Indoor-Outdoor Control should be installed as
follows:

1. Install it on a vertical surface such as a wall or the side of a
joist.

2. Do not install it on a heated surface such as on the boiler or
a hot water pipe.

3. Install it high enough so that it will be convenient to make
adjustments on round dial and large screw at bottom of case.

4. Install it so end of case with electrical outlet is on top.

NOTE

Use care not to bend or dent either of the sensing bulbs

The underside of the eaves or
overhang of a NORTH or
NORTHWEST roof is normally
a good location. It should be
exposed to the circulation of air
and wind.

INSTALLED
ON JOIST

INSTALLED
HIGH ON WALL

WIRING & OPERATION

All wiring should be done in accordance with local and national electrical codes and ordinances.

This indoor-outdoor control is designed to vary boiler
temperature according to outdoor weather conditions.
For this reason, it is recommended that this control only
be used on systems where the domestic hot water supply
is heated by a separate source from the heating boiler.

The most common method for using an indoor-outdoor
control is shown in the block diagram below, and in the
wiring diagrams which follow. A separate high limit control
should always be used with an indoor-outdoor control.

INDOOR
OUTDOOR
CONTROL

HOT WATER BOILER

HIGH LIMIT
CONTROL

BURNER

CIRCULATOR

ROOM
THERMOSTAT

RELAY

2

WIRING & OPERATION CONT.

All wiring should be done in accordance with local and national electrical codes and ordinances.

BURNER CONNECTIONS

Burner Operation

The indoor-outdoor control cycles the burner
to vary boiler temperature to outdoor weather
conditions.

TYPE 668 OIL

BURNER CONTROL

T

T

BURNER MOTOR

IGNITION

TRANS.

INDOOR
OUTDOOR
CONTROL

HIGH LIMIT

Using Oil burner control

HOT

LINE

N

LINE

INDOOR
OUTDOOR
CONTROL

HOT

N

TRANSFORMER

HIGH LIMIT

Using Gas or
Solenoid Gas
Valve

HIGH LIMIT

24V A.C.

DIAPHRAGM

GAS VALVE

THERM PILOT TRANS

SAFETY

PILOT

INDOOR
OUTDOOR
CONTROL

Using diaphragm
Gas Valve

24V A.C.

TRANSFORMER

SAFETY

PILOT

LOW VOLTAGE
GAS VALVE OR
SOLENOID GAS
VALVE

HOT
LINE

N

CONNECTIONS TO CIRCULATOR

Circulator Operation

1. Unzoned Systems, or Circulator-Zoned Systems — The

thermostat cycles the circulator motor (through a relay) to
meet the demand for heating.

2. System Zoned with Water Valves – Auxiliary contacts of
water valves cycle circulator motor (through a relay) to meet
the demand for heating. (The circulator runs as long as any
zone is calling for heat.)

6

4

56

452

123

ADDITIONAL

ZONES

4

56

452

123

6

4

56

452

6

123

HOT

LINE

N

4

6

123

TRANSFORMER

For Unzoned Sytems,
or Systems Zoned
With Circulators

4

56

452

56

452

6

123

CIRCULATOR

MOTOR

TYPE 809 RELAY

1 2 L L

THERMOSTAT

TYPE 809

RELAY

1 2 L L

CIRCULATOR

MOTOR

FIELD
INSTALLED
JUMPER

HOT
LINE
N

For Systems Zoned
With Water Valves

HOT

LINE

N

3