Outdoor Sensor to Master Boiler
SL 40-399 G3 SL 40-399 G3 SL 40-399 G3 SL 40-399 G3
Master Subordinate Subordinate Subordinate
Cold
To Baseboard Domestic
Heating Hot
Water
hot water hot water
2 storage storage
RP Secondary Loop tank tank
Sensor to
fill station with isolation Master Boiler
valve closed
or: fill tank 4
3
Notes
1 – 4-Boiler back-to-back Multiplex racking system shown, IBC part 90-167. System comes complete
with floor stands, near-boiler piping, check valves, 4 manifold headers and UPS 43-44 boiler
pumps.
2 – Note integral or external check valves for each pump. IBC 399 4.2.base.dhw
3 – Pump on domestic side is stainless steel or bronze, and activated by boiler through a 2-pole line- DRAWN BY DATE
voltage relay to simultaneously pull on heat exchanger pump. BRAD POULSEN 19/10/2017
4 – Hot water tank sensor to master boiler; recommend that DHW tank sensors be run from each
1 IBC Multiplex Racking System, DESCRIPTION
tank, but only one is connected; other is to be labelled a spare.
model 90-167 2+2 back-to- 5 – Boiler network serves space heating demand when hot water load is satisfied. Four-boiler installation with two loads, Baseboard
back, with 4" manifold headers 6 – Storage tanks piping is symmetrical for equal flow and matching tank temperatures. heating and DHW.
7 – Vacuum relief valve; thermal expansion tank for domestic water also recommended.
CAUTION: Thi s drawing is a simple schematic gui de to a successful i nstallat ion. There may be many necessary components not shown here. We require that our boilers be installed by licensed PAGE
and experienced trades people who are fami liar wi th the applicable local and national codes. Sy stem design is to be completed by an experienced hydroni c designer or Engi neer. It is necessary
to carefull y read and fol low the instal lation i nstructi ons that come with the boiler along wi th the application drawing that fits your system. 1 OF 2
Wiring Diagram
Middle Subordinate 5
Master Boiler Subordinate Boiler
Boilers – typical of 2 120VAC
120VAC 120VAC
(HOT) (COM) (HOT) (COM) (HOT) (COM)
G
Field-wiring
G G
Field-wiring
Field-wiring
black
black black AC in L
Bundle
AC in L AC in L
Bundle
Bundle
white
N white
N white N
Primary L yellow Boiler Primary L yellow Boiler Primary L yellow Boiler
white
Pump N white
Pump Pump N white
Pump Pump N Pump
Baseboard Programming Notes
120V double
Pump pole relay – For Master Boiler, in Installer Setup menu set
7 6 Load 1 as Reset Heating. Set Water ° From to
8 5 Storage Tank
1 4 Pump Secondary Loop. Adjust Design Outdoor
2 3 Temperature to local value.
– If no dry contact is available for space heating,
DHW Heat Ex. consider Heat Load by Sensor programming; see
Pump Factory-
Factory- Tech Bulletin for full information. Setting Burner
Factory Installed 2 installed
installed on From to Temperature Sensor allows
programmer to initiate heating based on
temperature drop at Secondary Loop Sensor.
– In the same Installer Setup menu set Load 2 as
Building
6
DHW. :arge DHW storage tanks often have a Tank
T-Stat Differential around 6°F.
– For any load: Maximum Supply Temperature acts
as a high limit.
1 1 1 – In Installer Setup Menu Load Combining can be
used in Basic Mode to run DHW simultaneously
3 with Baseboard Heating if desired.
– See memo Multiple Boiler Systems for full details
about establishing a boiler network. For the
Master Boiler only, in Installer Setup Menu /
MultiBoiler, turn Master Boiler to On, and define
Boiler ID as 1 . Set Boiler ID at subordinate boilers
to 2 , 3 and 4 respectively, leaving Master
Boiler Off.
– In Master Boiler Multiboiler menu, set staging
4
delay to 9 min. This value is an estimate and may
need to be revised.
Wiring Notes IBC 399 4.2.base.dhw
1 – No external voltages to be applied to TB2 control terminal strip connections 1-20. DRAWN BY DATE
2 – Pump circuits are fused for a total draw of 5A; maximum amperage draw of 4A per pump is recommended.
BRAD POULSEN 19/10/2017
3 – Outdoor sensor installed on North-facing exterior wall for accurate reading of outdoor temperature. DESCRIPTION
4 – Boiler network wires are polarity-sensitive, and must be twisted once per inch, and not be routed parallel to line voltage wires
Four-boiler installation with two loads, Baseboard
5 – Boilers 2 and 3, being non-terminal boilers in the network, have their Jumper A02 removed, as illustrated in Multiple Boiler
heating and DHW.
Systems Tech Memo (or see Touch Screen manual page 25).
6 – If building does not have a t-stat, this connection can be replaced with Heat Load by Sensor programming (see Programming).
CAUTION: Thi s drawing is a simple schematic gui de to a successful i nstallat ion. There may be many necessary components not shown here. We require that our boilers be installed by licensed PAGE
and experienced trades people who are fami liar wi th the applicable local and national codes. Sy stem design is to be completed by an experienced hydroni c designer or Engi neer. It is necessary to 2 OF 2
carefully read and foll ow the install ation instructions that come with the boi ler along wit h the applicati on drawing t hat fit s your system.
