Solo Plus Instructions 1-800-782-9927 Version 12-13
Tarm Biomass · 4 Britton Lane · Lyme, NH 03768
3.4.11 Electrical Connections
The control panel on the Solo Plus is supplied as a pre-wired assembly. All that is required on-site is
to connect to 120 Volt service at the junction box that was installed on the back panel of the boiler.
Please refer to electrical drawings in Section 6.
3.4.12 Boiler Control Panel Connections
The 3 sensors bulbs from the control panel are pre-installed in well #21
.
Insure that the sensor bulbs
are pushed all the way to the bottom of the well. The brass diaphragm well for the pressure gauge is
preinstalled in well #23.
VERY IMPORTANT!
The thin stainless sensor for the Lo-Limit thermostat
is preinstalled in the drywell over the flue collection box. Leave it in this location for operating the
boiler with a thermal storage tank. The Lo-Limit is set to
90 ºC (194 ºF).
If the boiler will be operating
without a thermal storage tank, the stainless sensor must be moved to well #24 with the three sensors
from the control panel. The Lo-Limit needs to be set to
60 ºC (140 ºF)
when operating without a ther-
mal storage tank (refer to
Section 3.3.5
and
Section 4.1
).
3.4.13 Description of Functions
Note in brackets
(Section 4.1).
To start the boiler from cold, the reset switch
(N)
must be pressed, after which a relay closes and re-
mains active. The relay switches the fan and circulator on. When the boiler temperature reaches the
minimum thermostat setting
(P).
Boiler thermostat
(I)
regulates the boiler. If the boiler temperature
falls below minimum thermostat setting
(P),
the fan is switched off.
3.4.14 Operating Thermostat
The Operating Thermostat regulates the fan. Moving the knob in the clock-wise direction will raise the
boiler’s set-point (temperature). The recommended operating range for the boiler is
180-185 ºF
(82-85 ºC).
The Operating Thermostat’s Hi-Limit is 194 ºF (90 ºC). By using the boiler’s temperature
gauge, adjust the boiler’s set-point by moving the Operating Thermostat. This should be set at initial
start-up. There is a metal spring clip inside the knob to help keep the knob from moving out of adjust-
ment. The boiler can be operated above 180 ºF (82 ºC) if it is used without storage or with a thermal
storage tank that can withstand pro-long temperatures above 180 ºF (82 ºC).
Do not operate the
boiler the boiler above 180 ºF (82 ºC) if it is used with a thermal storage tank with an EPDM
rubber liner. (see Section 4.1). The boiler should not be operated below 180 ºF (82 ºC).
3.4.15 Lo-Limit Thermostat
There is a Lo-Limit thermostat on the boiler control panel which switches off the fan if the wood has
burned out. When the boiler is operated without a thermal storage tank, set the dial to
60 °C (140 ºF)
.
The thin sensor must be placed in well #21.
When the boiler is operated with a thermal storage tank,
set the dial to
90 ºC (194 ºF). The thin sensor must be placed in the drywell over the flue collec-
tion box. (see Section 4.1).
Boiler Installation & Start-up > Electrical Connections
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