10/22/2008
4
BI302B
Boiler/Plumbing Kit Placement
– This model series is wall hung and the vessel must be vertical.
The plumbing kit items are located adjacent to the boiler housing itself as shown on drawing BX304.
For future servicing, the unit itself must be installed a minimum of 18” above the floor. The
elements are screwed in from the bottom.
Allow adequate space for cover removal and maintenance.
Expansion Tank
- As a closed loop hydronic heating system, a minimal expansion tank is required. This can
be an air diaphragm tank as provided in the plumbing kit or a basic “empty” tank where air is compressed at
the tank top.
Temperature/Pressure Gauge
- Recommended to observe the operation of the system. Actually a
temperature gauge at the inlet and outlet is desirable.
Pressure Safety Valve
- This is required at the hot outlet and is furnished as a
loose
component with the
boiler unit itself. Failure to install the provided, 30 PSI, pressure relief valve as shown void warranty and the
CSA product listing.
Add the necessary pipe extension from the relief valve to the floor to prevent water damage on this unit or
surrounding area.
Gate Valve/Drain Valve
- These are for servicing and easy fill purposes.
Circulating Pump
- Depending upon system lift and system loop resistance (feet of head), the proper
circulating pump is required to guarantee the minimum GPM flow as specified on the cover sheet.
Comment
: Circulator pump can be in the outlet or inlet. However, the circulator pump should “pump away
from” the expansion tank.
Air Vent
– Whenever there is a plumbing point higher than any of the components shown or an adjacent line
(any vertical “U” trap), an air vent valve should be provided.
Building Water Supply Connection
– Reference drawing BX304, note 4, some local building codes require
sophisticated check valve or anti-siphon check valve when the hydronics heating system is permanently
connected to the domestic water system. The intent of this connection is temporary and for fill purposes only.
The installer has the responsibility of complying with local building codes.
ELECTRICAL HOOKUP
Reference drawing BH304.
WARNING
DISCONNECT ALL ELECTRICAL POWER BEFORE ELECTRICALLY CONNECTING OR
SERVICING THE UNIT. FAILURE TO DISCONNECT THE ELECTRICAL POWER BEFORE
WORKING ON THIS PRODUCT CAN CREATE A HAZARD LEADING TO PERSONAL INJURY
OR DEATH.
1.
Panel breaker sizes
– 4.5 kW Mini-Boiler will require 30-amp breaker, copper wire. 9 kW Mini-Boiler will
require 50-amp breaker, copper wire.
2.
24Ø Volt Power Source
– route and install the proper current carrying conductors, suggested by local codes,
from service panel fuse or circuit breaker. Nameplate shows current & KW rating.
NOTE:
This model series is designed and equipped for 240-volt residential single phase. If this unit is used on 208
volt, energy capacity is reduced and there is a possibility of intermittent relay operation. Call factory for 208-volt
application.
The source is either from the standard service panel or may be part of an off-peak separately metered panel/CT
metered enclosure. Consult with local utility if questions on off-peak installations.
Since this unit is less than 10 kW, no fusing or circuit breaker at the boiler itself is required. The 240-volt (L1,
L2, with copper ground) is connected directly to the left bottom terminal block.