Steffes 3120 Installation Guide

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Page 1

Manufactured in North America

COMFORT PLUS

Model 3120

with ECM Variable Speed

Blower System

Quick Reference Installation Guide

1 2

PLACEMENT AND CLEARANCES

606015

A M

P M

STEFFES

Front View

Top View

1. Remove heating elements from base

2. Place system in desired location.

3. Adjust leveling legs to prevent

4. Remove painted front panel of brick

5. Position element wiring harnesses to

6. Remove galvanized front panel.

WARNINGWARNING

WARNING

WARNINGWARNING

The area in which the Comfort Plus is installed must remain free of debris and room air should be maintained at less than 85oF.

A Back = zero clearance B Front = 36 inches (for servicing) C Right Side = 8 inches (from combustible

material) D Top = 8 inches (from combustible material) E Left Side = 4 inches F Outer Sides of Return and Supply Ducts =

zero clearance

7. Starting at bottom, lift and drape

8. Remove front air channel by pulling

9. Remove the electrical panel cover

G Bottom = zero clearance

 DO remove the Comfort Plus

BRICK LOADING

 DO NOT extend leveling legs more

Starting at the back of the brick core, load bricks one row at a time using left side, right side, center

 DO use and follow generally

pattern. Place bricks with grooved side facing up, notch facing forward, and ridges on left and right.

 Remove loose brick

NOTCH IN BRICK

 DO have equipment installed by a

debris from brick.

 Brick rows MUST line

up front to back and side to side.

 Reference Owners and Installers

SET-UP

of system.

rocking.

storage cabinet.

avoid damage during brick loading.

insulation blankets over top of system.

out at bottom.

and locate element screw kit and outdoor sensor.

WARNINGWARNING

WARNING

WARNINGWARNING

system from its shipping pallet before installing.

than one inch.

accepted safety practices when handling insulation material.

qualified technician in compliance with all applicable local, state and national codes and regulations.

Manual for complete safety, installation, and operation instructions.

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HEATING ELEMENT AND AIR CHANNEL INSTALLATION



½ HP Variable

WARNINGWARNING

WARNING

WARNINGWARNING

HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death.

 DO NOT remove electrical panel cover while system is ener-

gized.

 Elements MUST be positioned properly to avoid short circuit-

ing them against any surfaces within system.

 Use care when making connections to avoid element dam-

age.

1. Insert heating elements between brick layers until element ends embed into side cutouts of brick cavity. The threaded screw tabs on wire connection terminals should point forward.

2. Install air channel with air deflectors (arrow shaped pieces) facing inward and narrow ends of deflectors pointing up. Place top of air channel in first.

3. Lower insulation blankets back into position, one at a time. Tuck sides into edges, corners and around exposed portions of heating elements.

4. Install galvanized panel. Slide the top inside the upper lip of top painted panel. Bottom rests on the outside of the brick cavity.

5. Connect wiring harnesses to heating elements using screws in element screw kit. Install screws with heads up and threads pointing down. Tighten screws to 14 in·lbs.

6. Check non-insulated element connections to make sure they do not come within 1/2" of any surface.

7. Install painted front panel.

Element-to-Wiring

Harness Connections

IMPORTANT

DUCTING

1. Assemble factory supplied return air plenum per the instructions provided with the plenum.

2. Once assembled, set plenum on right side of

HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death. DO NOT operate the Comfort Plus heating system without ducting installed to both the air inlet and outlet.

the system with air filter and indoor coil access covers facing forward. Line up predrilled holes on system with holes in flanges of plenum and attach using screws provided in plenums hardware package.

NOTE: The 3100 series is factory config-

ured for a right-to-left airflow.

27"

3. Insert air filter into filter rack.

4. Connect return air duct to top of plenum.

5. Connect supply air duct in structure directly to systems air outlet.

6. If necessary, adjust supply air blower speed by using the chart below.

7. The W/E jumper MUST be in the ON position or the blower will not operate with an E call from the thermostat.

External static pressure should not exceed .75 inches water column.

Jumper

Spee d CFM

A 1000 B 1200 C 1400 D 1600

WARNINGWARNING

WARNING

WARNINGWARNING

Top of System

16"

 When interfacing with a heat pump, the A-Coil MUST

be placed on the return air side.



 To maintain a room temperature of 85



mechanical room, a 24" x 24" opening can be installed in the area or a 6" x 6" non-closing register can be cut into the return air duct. Refer to Placement and Clearance Requirements section of Owners and Installers Manual for more information.

F or less in the

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AIR CONDITIONER/HEAT PUMP INTERFACE

When interfacing a heat pump with the Comfort Plus, the A-coil MUST be placed in the return air plenum.

WARNINGWARNING

WARNING

WARNINGWARNING

Risk of fire. Any one ducting system MUST NOT contain more than one air handling (blower) system.

The 3120 Comfort Plus heating system can accommodate most heat pump or air conditioner indoor coils up to a 3 1/2 ton capacity provided the heat pump or air conditioner is sized in accordance to supply air delivery rates of the Comfort Plus.

The maximum coil size the factory supplied return air plenum can accomodate through the front access is

25.5" (W) x 22" (D) x 29.93" (H). The inner dimensions of the coil area are 26" (W) x 22" (D) x 30.96" (H).

LOW VOLTAGE PEAK CONTROL CONNECTIONS

1. Route low voltage wire from load control device to terminal block.

2. Connect field wiring to RP and P positions.

Dry Contact Peak

Control Switch

Aux.

Peak

Relay

To Control Board

Inputs

COM

Comfort Plus

To Control Board

R C

NCAPNO

Outdoor

Air

LV Circuit Board

Y1AUX Y2 G

P11

RLY1

Fid 2

H/E2Y1CO22RP P

D3D7D5

Blower

Speed

R2 D6 D4

W E

J3J1J2

Y1 Y2

P10

Blower

Water

If utilizing a Steffes Time Clock Module or Power Line Carrier control, refer to the instructions shipped with that device for installation information.

LINE VOLTAGE ELECTRICAL CONNECTIONS

WARNINGWARNING

WARNING

WARNINGWARNING

HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death. Do not energize the Comfort Plus heating system until installation is complete.

1. Route all line voltage wires through knockout(s) and into electrical panel.

2. Make proper field wiring connections, phasing circuits as shown. Reference the Unit Identification label for circuit information.

 To ensure proper operation and safety, all line voltage circuits

must be segregated from low voltage wiring.

 To reduce electromagnetic fields associated with electrical

circuits and to avoid induced voltage on sensors and electronic devices, the circuit phases MUST be alternated as shown.

 DO NOT install any wiring in the line voltage compartment of

the Comfort Plus heating system unless it is rated for line voltage.

LOW VOLTAGE OUTDOOR SENSOR CONNECTIONS

The outdoor temperature sensor can be installed by wiring it directly to the system or to the Steffes power line carrier (PLC) system.

Direct Wired:

If connecting to the Steffes power line carrier system, follow the installation instructions in the PLC systems Owners and Installers Guide.

1. Mount outdoor sensor in a location where it can accurately sense outdoor temperature.

2. Route low voltage wire from outdoor sensor to electrical compartment:

 Outdoor sensor wire MUST NOT be combined with other

control wiring in a multi-conductor cable.  Seal external wall openings.  Outdoor sensor lead can be extended to 250 ft.  Unshielded Class II (thermostat) wire can be used

provided it is segregated from any line voltage wiring.

3. Connect outdoor sensor wires to the two "OUTDOOR" posi-

AUX

P11

RLY1

Fid 2

tions of the low voltage terminal block.

BLOWERS/CO NTROLS CIRCUIT

CHARGE CIRCUIT #1

CHARGE CIRCUIT #2

LINE 2

LINE 1

LINE 2

LINE 1

C ircu it B re a ke rs

LINE 1

LINE 2

Full Load Current

Shown for 240VAC only. Circuit deration not included.

Model Control Crct Chrg Crct #1 Chrg Crct #2

3120 - 14.0kW 6.00 29.17 29.17 3120 - 17.0kW 6.00 36.46 36.46 3120 - 21.6kW 6.00 45.00 45.00

Outdoor Sensor

Aux.

Peak

Relay

To Control Board

Inputs

COM

Comfort Plus

To Control Board

P8 P9

R C

NCAPNO

Outdoor

Air

LV Circuit Board

Y2 G

H/E2Y1CO22RP P

D3D7D5

Blower

Speed

R1 R2

W E

J3J1J2

Y1 Y2

P10

Blower

Water

To Service (Breaker) Panel

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

LOW VOLTAGE ROOM THERMOSTAT CONNECTIONS

A 24 VAC thermostat must be used (digital recommended).

1. Disconnect power to the Comfort Plus system.

2. Route low voltage wires from the thermostat to the Comfort Plus System.

3. Insulate thermostat wire wall opening if necessary and attach thermostat to the wall. When using a mechanical thermostat or thermostat with anticipator, resistor kit #1190015 must be installed to ensure proper operation.

4. Connect low voltage wires from thermostat into terminal block as shown.

NOTE: For detailed heat call information, reference the Owner's and Installer's Manual.

Stand Alone Furnace Application with Uncontrolled Air Conditioning

Honeywell

TH5110D

R Y C

Air Conditioner

(If being used in the

Connections

application)

IMPORTANT

The Y1/Y2 Jumper must be installed

The W/E Jumper must be installed

Single Stage Heat Pump Application

Honeywell TH5220D

Aux

ELCG O/B RYRc

IMPORTANT

The Y1/Y2 Jumper must be installed The W/E Jumper must be installed

Two Stage Heat Pump Application

Honeywell TH5320U

Aux

IMPORTANT

The Y1Y2 Jumper must be removed

The W/E Jumper must be installed

Y1AUX G OY2 Y1

P11

D5 D7 D3

R1 R2

RLY1

Fid 2

RRYCO/BG

H/E

Y1AUX OGY2 Y12Y222O

P11

RLY1

D5 D7 D3

Blower

Speed

CBA

W E

J3J2J1

Y1 Y2

P10

D6 D4

Fid 2

AUX

Blower

Y2 GY1

P11

D7D5

R1 R2

RLY1

Fid 2

Aux.Peak

Relay

To Control Board

Outdoor

Air

Outdoor

LV Circuit Board

Inputs

Comfort Plus

APPRP

To Control Board

COM

P8 P9

H/E

P10

Blower

Speed

W E

Y1 Y2

Blower

2O22

P3 P2

CBA

J3J2J1D2J4

Water

Blower

Speed

W / E

ABC

J1J2J3

Y1 / Y2

To Heat Pump

Y - Compressor C - Low Voltage Common R - Low Voltage Hot O - Reversing Valve

Outdoor Sensor

Blower

Peak Aux. Inputs Relay

APPRP

Outdoor

COMNCNO

P2P3

Air

Water

To Control Board

Comfort Plus

LV Circuit Board

To Control Board

Speed

W / E

ABC

J1J2J3

Y1 / Y2

To Heat Pump

Y1 - Compressor Stage 1 Y2 - Compressor Stage 2 C - Low Voltage Common R - Low Voltage Hot O - Reversing Valve

Aux.

Peak

Inputs

H/E

W E

Y1 Y2

P10



Y2Y1

Blower

Speed

DAB

J1J2J3

Blower

Water



To Control Board

Outdoor

Air

Outdoor

RP2APP

Comfort Plus

LV Circuit Boar d



To Control Board

Relay

COM









Blower Speed

W / E

ABC

J1J2J3

Y1 / Y2

SOFTWARE CONFIGURATION AND INSTALLERS FINAL CHECKOUT

To ensure proper operation, the system software must be configured for the application. Refer to the Configuration Menu in the Owner's and Installer's Manual or to the Configuration Guide provided by your local power company. Also, complete the Installer's Final Checkout Procedure found in the Owner's and Installer's Manual.

3050 Hwy 22 North w Dickinson, ND 58601-9413 w www.steffes.com

Part No. 1200285-6