AM and PM Indicator Lights
The AM and PM indicator lights are only utilized if the Steffes Time Clock Module is
being installed. With this module installed, the system displays time on AM/PM
intervals and the corresponding light flashes. The system can be configured to display
military time, in which case, both the AM and PM lights illuminate.
Mode (Edit) Button
Activates the editing menu for changing the operating
information of the system.
Up and Down Arrow Buttons
Used to scroll up and down when viewing or changing
operating functions.
Interface Port
FOR SERVICE USE ONLY! Allows technician external access for updating software and troubleshooting.
Operation
1.02
Comfort Plus Hydronic
CONTROL PANEL
Operation of the Comfort Plus Hydronic system is automatic. All operational functions are stored in its micropro-
cessor in function locations and are factory preset. If necessary, the user or installer can adjust them through the
control panel. (See Figure 1.)
Four-Digit LED Display
The four digit LED displays specific operating information. During an editing
process, the function locations and the values set in these locations are displayed
for viewing and adjusting purposes.
M
OPERATING STATUS
The Comfort Plus Hydronic is set to display various operating information as described below. Press and release
the up arrow to view this data.
Outdoor Temperature - indicates current outdoor temperature.
Operating Mode and Outlet Water Temperature - indicates the current operating mode
followed by the outlet water temperature.
C = Off-Peak (Charge) Time
P = On-Peak (Control) Time
A = Anticipated Peak Time
Heat Call Status - indicates the current heat call status as determined by the room
thermostat(s). The faceplate displays the highest heat call value present. If receiving a Stage
1 Forced Air Heat Call and a Hydronic Heat Call, the display will read
“
HC_3
”
.
HC_0 = No Heat Call
HC_1 = Stage 1 Forced Air Heat Call (if equipped with Air Handler)
HC_2 = Stage 2 Forced Air Heat Call (if equipped with Air Handler)
HC_3 = Hydronic Heat Call
COOL = Cooling Call (if equipped with Air Handler)
Targeted Brick Core Charge Level -
“
tL
”
(target level) followed by a number, indicates
the current percentage of brick core charge being targeted by the system. A display of
“
tL:_
”
indicates a target level of zero percent and
“
tL: F
”
indicates a full core charge target level.
Brick Core Charge Level -
“
CL
”
(charge level) followed by a number, indicates the
current percentage of heat stored in the brick core.
“
CL:_
”
represents zero percent and
“
CL:
F
”
represents a full core charge level.
A bar illuminates on the lower portion of the display's third digit when-
ever the heating elements are energized.
O
pe
ra
ti
on
CAUTION
Editing operating information may
alter the performance and opera-
tion of the system.
CONTROL PANEL
FIGURE 1
M
M
P
P
M
M
M
A
A
