Aprilaire 8870 Instructions d'exploitation télécharger pdf (Page 7)

• COMMUNICATIONS SET-UP – This is where the thermostat address is entered.

Additionally, the total number of thermostats is entered here to optimize communication

timing. This thermostat also has the ability to communicate at a baud rate of 19200, which

can be selected in Communications Set-Up. Consult a qualified service technician before

changing any of the values in this Sub-Menu (Sub-Menu not shown).

• TEMPERATURE SET-UP – The first and second stage differentials can be changed, as can

the display temperature offset. The differentials set the tightness of the temperature control.

If the equipment is operating too often, or the

temperature swings are uncomfortably large,

the differentials can be increased or decreased

respectively. The temperature offset (calibration)

allows the user to “customize” the temperature

shown on the display. Consult a qualified service

technician before changing any of the values in

this Sub-Menu (Sub-Menu not shown).

• BACKLIGHTING SET-UP – Both displays have

backlighting which can be controlled in three

ways (

see Figure 9

). First, backlighting can be

turned on every time a button is pushed. Second,

it can be configured to come on with a button

push, but only when the ambient light is below

a preset value. When “only when needed” is

selected, the user can select from two levels of

ambient light. Finally, it can be disabled.

FIGURE 9

• THERMOSTAT BUTTON LOCKOUT – This feature disables the buttons of the thermostat

completely, or to a limited degree. For example, the MODE and FAN status can be set

and then locked, so the buttons will not allow those settings to be changed. Additionally,

this can be set to allow changes for a limited time and amount of change. For example,

you can limit temperature changes to

3°, if desired (

see Figure 6

• SECURITY SET-UP – This prevents unauthorized individuals from accessing Thermostat

Set-Up. A code can be setup that must be entered to gain entry into Thermostat Set-Up.

Master key pass word is 7777 (

see Figures 7 and 8

FIGURE 7

FIGURE 8

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Aprilaire 8870 Instructions d'exploitation Page 7