Raypak 850 Instructions d'exploitation télécharger pdf (Page 42)

Toolbox Menu

The Toolbox Menu logs all error codes from the BTCII and PIM, as well as other functions. Up to 15 error codes

can be logged for a maximum of 24 days.

Table W: Toolbox Menu

Outdoor Reset Concept

The Temperature controller can change the System

Set Point based on outdoor temperature (Outdoor

Reset). The temperature controller varies the temper-

ature of the circulating heating water in response to

changes in the outdoor temperature. The heating

water temperature is controlled through the modula-

tion and/or sequencing of the cascade.

The Temperature controller can also control the sys-

tem circulating pump with an adjustable Outdoor

Cutoff. When the outdoor temperature is above the

Outdoor Cutoff, the pump is turned off and no heating

water is circulated through the system. When the out-

door temperature drops below the Outdoor Cutoff, the

system pump relay is activated and the heating water

circulates through the system. The temperature of the

heating water is controlled by the Reset Ratio, Water

Offset, and changes with the outdoor temperature.

Reset Ratio/Outdoor Reset

When a building is being heated, heat escapes

through the walls, doors, and windows to the colder

outside air. The colder the outside temperature, the

more heat escapes. If you can input heat into the build-

ing at the same rate that it is lost out of the building,

then the building temperatures will remain constant.

The Reset Ratio is an adjustment that lets you achieve

this equilibrium between heat input and heat loss.

The starting point for most systems is the 1.00

(OD):1.00 (SYS) (Outdoor Temperature: Heating

Water Temperature) ratio. This means that for every

degree the outdoor temperature drops, the tempera-

ture of the heating water will increase one degree.

With the VERSA, both ends of the slope are

adjustable. It is factory set at 70°F water temperature

(Boil START) at 70°F outdoor air (OUT START), and

180°F water temperature (Boil DESIGN) at 10°F out-

door air (OUT DESIGN).

Each building has different heat loss characteristics. A

very well insulated building will not lose much heat to

the outside air, and may need a Reset Ratio of 2.00

(OD):1.00 (SYS) (Outdoor: Water). This means the

outdoor temperature would have to drop 2 degrees to

increase the water temperature 1 degree. On the other

hand, a poorly insulated building may need a Reset

Ratio of 1.00 (OD):2.00 (SYS). This means that for

each degree the outdoor temperature dropped the

water temperature will increase 2 degrees. The

VERSA control Reset Ratio allows for full customiza-

tion to match any buildings heat loss characteristics.

A heating curve that relies not only on Outdoor temper-

ature but also on the type of radiation will improve heat

comfort. The user can fine tune these adjustments

based on the specific building need.

Item Description

Lookup Active Error Look up and display the active error info.

USER TEST

Select ON to start the function. The setting returns to default after the test is run.

(See Page 47 for details.)

MAX HEAT

Select ON to start the function. The setting will time out to OFF after 24 hours or can

be set to OFF again by the user. (See VERSA IC Applications Guide for details.)

P/N 104901 Software number of the Raypak VERSA

DEFAULTS

Resets to factory settings. Press UP and DOWN for 1 second to show CLR and load

factory defaults to all settings. This will also clear all history.

HISTORY

lookup logged error

Displayed when an error code is present. 1 indicates the most recent error code.

Press UP and DOWN for 1 second to clear the error logs.

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 59 60

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Raypak 850 Instructions d'exploitation Page 42

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