Arts Echnical Upport; Terminal Block Assignments - Power Block; Terminal Block Assignments - High Voltage Circuit (Tb2); Terminal Block Assignments - Low Voltage Circuit (Tb1) - Harsco Industrial P-K SONIC SC-3000 Installation & Owner's Manual

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!
WARNING
Spare parts and replacement parts can be ordered from Harsco
Industrial, Patterson-Kelley by calling toll free (877) 728-5351. Reach us
Use of Non-Factory Authorized
by fax at (570) 476-7247.
replacement parts are not
recommended for this equipment.
Refer to the parts list shown on the assembly drawings provided in this
All control components are manual.
engineered for safety and are
Technical information is also available by calling or visit the Harsco
designed to work in unison with
Industrial, Patterson-Kelly website, www.harscopk.com.
each of the other components.
Use of non-factory authorized When ordering replacement parts please have the model number and
replacement parts jeopardizes the serial number of your boiler available.
functionality of the safety features
Typical schematic drawings are shown on the following pages. Drawings
as well as the performance of the
specific to your particular boiler can also be supplied by your local Harsco
boiler.
Industrial, Patterson-Kelley representative.
6.1 W d
IrIng IagraMs
6.1.1 terminal Block Assignments – Power Block
The power block is located in the junction box in the front of the boiler, at the lower left corner. This junction box
houses the transformer, the fuses, the power block terminal strip circuit breakers, and the blower relay.
The three space terminal strip circuit breakers are mounted on
wires. There is an additional space on the
phase, 60 hz. The boiler requires a dedicated ground wire. Do not ground through the conduit.
6.1.2 terminal Block Assignments — high Voltage Circuit (tB2)
terminal Number label
120V AC Neutral
3
120V AC Neutral
4
120V AC Neutral
5
6 120V AC Neutral
120V AC Neutral
7
10 120V AC SW OUTPUT
120V AC 3 WAY VALVE
11
120V AC DHW PUMP CNTR
12
120V AC CIRC PUMP CNTR
13
120V AC DAMPER RELAY
14
MASTER ALARM RELAY
15
16 MASTER ALARM RELAY
FLAME DETECTED RELAY
17
18 FLAME DETECTED RELAY
34 Harsco Industrial, Patterson-Kelley Technical Service 1.877.728.5351
/T s
arTs eChnICal upporT
rail and are for connection of the three power
DIN
rail for a ground connection. This boiler requires
DIN
Description
Neutral for use with TB2-10, Switched Output
Neutral for use with TB2-11, 3 Way Valve
Neutral for use with TB2-12, DHW Pump Contactor
Neutral for use with TB2-13, CIRC Pump Contactor
Neutral for use with TB2-14, Damper Output
120V AC output when boiler is switched on (0.5 amp
max)
120V AC output during CH Mode. 3 way valve is
normally closed (not powered) for DHW, and powered
open for CH Mode.
120V AC output when boiler is in DHW Mode (pilot duty
only)
120V AC output when boiler is in CH Mode (pilot duty
only)
120V AC output when boiler is enabled (pilot duty only)
This circuit closes when the boiler is in an alarm state
This circuit closes when the boiler is firing
Gas Fired Boiler
6.1.3 terminal Block Assignments — low Voltage Circuit (tB1)
terminal Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
208-240 V,
three
16
17
18
19
20
label Description
ENABLE / DISABLE Boiler Enable, Contact Closure.
ENABLE / DISABLE
DO NOt eNeRGIZe.
EXTERNAL INTERLOCK External Limit, Contact Closure.
EXTERNAL INTERLOCK
DO NOt eNeRGIZe.
OUTDOOR TEMP SENSOR Outdoor temperature sensor
OUTDOOR TEMP SENSOR
DHW STAT OR SENSOR Domestic Hot Water sensor or thermostat
DHW STAT OR SENSOR
HEADER TEMP SENSOR Header temperature sensor
HEADER TEMP SENSOR
DHW FLOW SWITCH Domestic Hot Water flow switch
DHW FLOW SWITCH COMMON
DHW flow switch indicates potable water flow/
usage
0-10V ANALOG INPUT Variable Input (VDC) for remote control of boiler (+)
0V ANALOG INPUT 0V for use with TB1-13 (-)
For Future Use Not Used
For Future Use
MODBUS COM 1A Modbus connection to boiler
MODBUS COM 1B
CASCADE A TO A Cascade connection between boilers
CASCADE B TO B
Harsco Industrial, Patterson-Kelley Technical Service 1.877.728.5351
Gas Fired Boiler
35